You're doing good on Weezy. I agree with early capping agility because it's a major attribute for CB's and both will need to be extremely high to be an efficient return man anyways. Hopefully you were intense training agility/vision while you were stockpiling SP's.
As Basker attested to, start jacking up speed EXTREMELY high. Don't touch vision, strength, or carrying because you'll need them as training options throughout your career (plus you know me, I don't like vision early for return men). Just get speed to the 7/1 cap and agility to the 6/1 cap. Avoid all else until then. Let training work on your other attributes.