I think it's an interesting idea, but I think there's a lot simpler and more elegant way to do this. Forgive me for the long read.
The basic idea is to have each Coach/Asst Coach have specializations for each team. This will aid in the development of a team identity, but also allow it to be changed as needed and does not necessarily tie a user to a particular play style. There will also be a decay factor to keep a team from just building bonuses and just staying the best as well as a reset of the bonuses on team reset (to prevent ruining rookie).
Coordinator specializations will be chosen at the beginning of a season and will be locked in.
Offensive Coordinator style specializations could include (max 6 points/season):Power Rushing Offense: Power Rushing increases the Power Running, Balance, and Carrying Awareness stats by 2%/4%/6% for all HBs/FBs and increases the Run Block Technique for all positions by 3%/5%/7%. All Power Running rolls within 10 yards are guaranteed to be at least 5%/7.5%/10% of max.
Elusive Rushing Offense: Elusive Rushing increases the Elusive Running, Quickness, and Carrying Awareness, stats by 2%/4%/6% for all HBs/FBs and increases the Run Block Technique for all positions by 3%/5%/7%. All Elusive Running rolls within 10 yards are guaranteed to be at least 5%/7.5%/10% of max.
West Coast Offense: West Coast increases the Catch in Traffic, Receiving Awareness, and Receiving Grip of all eligible receivers by 2%/4%/6% and increases Pass Block Technique for all positions by 3%/5%/7%. All penalties for jumping/diving catches are reduced by 5%/7.5%/10% for passes under 10 yards.
Vertical Offense: Vertical increases the Receiving Hands, Receiving Awareness, and Route Technique of all eligible receivers by 2%/4%/6% and increases Pass Block Technique for all positions by 3%/5%/7%. All penalties for jumping/diving catches are reduced by 5%/7.5%/10% for passes longer than 10 yards.
Balanced Offense: Balanced Offense increases the Elusive Running, Power Running, Carrying Awareness stats of all rushers by 1%/2%/3% and increases the Run Block Technique and Pass Block Technique for all positions be 1%/2%/3%. All power and elusive running rolls are guaranteed to be 3%/5%/7% of max. It also increases the catch in traffic, route technique, and receiving awareness of all eligible receivers by 1%/2%/3% and reduces all penalties for jumping/diving catches by 2%/4%/6%.
Assistant OC specializations could include (Up to 3 points/season):OL Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all OL: Run Block Technique, Run Block Power, Pass Block Technique, Pass Block Power
WR/TE Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all WR/TE: Route Technique, Route Elusiveness, Receiving Hands, Catch In Traffic, Run Block Technique
QB Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all QBs: Pocket Awareness, Pass Awareness, Pass Consistency
RB Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all HBs/FBs: Carrying Grip, Carrying Awareness, Route Technique, Receiving Awareness, Run Block Technique, Pass Block Technique.
Conditioning Coach: Grants 3%/5%/7% bonuses to one of the following traits for the next game (to be assigned before each game) to all offensive players: Conditioning, Toughness, Heart
Defensive Coordinator style specializations could include (max 6 points/season):Man Defense Specialist: Man Defense increases the Man Awareness, Coverage Technique, and Deflecting stats by 2%/4%/6% for all CBs/Safeties/LBs. Reduces the likelihood of defenders being fooled by pump fakes by 2.5%/5%/7.5%. Guarantees all deflection rolls for players in man coverage are at least 5%/7.5%/10% of max.
Zone Defense Specialist: Zone Defense increases the Zone Awareness, Coverage Technique, and Deflecting stats by 2%/4%/6% for all CBs/Safeties/LBs. Reduces the likelihood of defenders being fooled by head fakes by 2.5%/5%/7.5%. Guarantees all deflection rolls for players in zone coverage are at least 5%/7.5%/10% of max.
Turnover Creation Specialist: Turnover Creation increases the Interception, Power Tackling, and Strip Technique by 2%/4%/6% for all players on defense. Guarantees all strip technique and interception rolls are at least 5%/7.5%/10% of max.
Wrap Up Specialist: Wrap Up increases the Tackling Technique, Power Tackling, and Tackling grip by 3%/5%/7% for all players on defense. All tackling rolls are guaranteed to be at least 5%/7.5%/10% of max.
Pass Rush Specialist: Pass Rush increases the Pass Rush Technique, Pass Rush Power, and Blitz Awareness by 3%/5%/7% for all players on defense. All pass rushing power and pass rushing technique rolls are guaranteed to be at least 5%/7.5%/10% of max.
Run Stop Specialist: Run Stop increases the Break Run Block, Hold Ground, and Pursuit by 3%/5%/7% for all players on defense. Push strength of all opposing blockers is reduced by 5%/7.5%/10%.
Balanced Defense: Balanced Defense increases the Break Run Block, Pass Rush Technique, Man Awareness, Zone Awareness, Coverage Technique, Blitz Awareness, and Pursuit by 1%/3%/5% for all players on defense. All pass rushing rolls are guaranteed to be at least 1%/3%/5% of max. Push strength of all opposing blockers is reduced by 1%/3%/5%. Reduces the likelihood of being fooled by pump fakes or head fakes by 1%/3%/5% and guarantees all deflection rolls are at least 1%/3%/5% of max.
Assistant DC specializations could include (Up to 3 points/season):DL Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all DL: Pass Rush Technique, Pass Rush Power, Break Run Block, Hold Ground
LB Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all LB: Man Awareness, Zone Awareness, Pass Rush Technique, Pass Rush Power, Tackling Technique, Break Run Block, Hold Ground
Secondary Coach: Grants 1%/3%/5% bonuses to one of the following traits for the next game (to be assigned before each game) to all CBs/FS/SS: Man Awareness, Zone Awareness, Deflecting, Intercepting, Pass Rush Technique, Tackling Technique, Break Run Block
Conditioning Coach: Grants 3%/5%/7% bonuses to one of the following traits for the next game (to be assigned before each game) to all defensive players: Conditioning, Toughness, Heart
All coaches would have 1 point guaranteed. Coordinators would gain points based on the # of playoff games they and their team had won over the past 3 seasons, with diminishing returns. Asst Coordinators would gain points as shown. All points for coordinators are lost for that team on team reset.
1st point: Guaranteed (1st Asst Coordinator Point)
2nd Point: 1 playoff win
3rd point: 2 playoff wins (2nd Asst Coordinator Point)
4th point: 4 playoff wins
5th point: 6 playoff wins (3rd Asst Coordinator Point)
6th point: 8 playoff wins
This system encourages coaching continuity, but the bonuses provided are small enough that they are unlikely to be game-breaking while allowing the ability to gain multiple bonuses and be a jack of all trades, or give a more specialized coach feel. It gives coaches benefits for playing well, but only for that particular team (sucks if you end up playing yourself in playoffs

). It also gives Asst. Coords something to actually do, and not just an lolGM.
Thoughts on the general concept (since the #s are likely to be tweaked)?