Setting player schemes

[Fixxer]

I know this thread has been preached allot so not trying to bump up the post and going to keep it short. I have a couple of examples of players that I am going to use.

1. I have a superstar development FS that is 1 year into his career (coach mode) he is a Balanced 4-3 attacking player. His overall is a 80 as a balanced player and his production rating is 27. If I change him to playmaker his overall goes to a 82 but production goes to a 27. I switched my scheme from the Patriots multiple d, hybrid to a 4-3 attacking because I am getting players to fit that scheme. Which direction do you guys think would be best to use this player?

2. I drafted a superstar development cb that is a 3-4 base, man to man cb. His overall is 81, mcv 85, zone 67, prc 87, press 81,speed 90, acc 92, agi 91, awar 84. I don't trust him on the field even though he should be a solid player he has only had 1 interception and 3 passes defended in 12 games but probably has not played in a few games. Should I trade him and acquire a 4-3 personal to fit my scheme or just keep bumping his zone or other low attributes?

Just looking for other peoples thoughts.