It would be really nice if there was SOME way to say "hey I know my offense has trouble pass blocking and I'd like to be able to keep in an extra blocker against a 3, 4, and 5 man rush to help double-team some rushers"
At least, I assume holding a blocker doesn't kick in until after they rush more than you have on the line? Which would explain why I've never seen a blocker be held in.
Might be nice to know how it's supposed to work - bhall, what kinds of rushes would blockers be held in on? 5+, 6+? 3+ to one side? Something else?
I haven't really done any tactics setting though so I don't know if the extra control of holding in blockers would make certain aspects of the game unfair to the defense. At the very least you'd be able to build a blocking only FB and hold him in 100% or something I guess? I dunno if knowing the FB doesn't need to be covered would help the D out in gameplanning, I don't think we have the plays to really use that sort of thing, but not sure.