Thus far, I have found only rare exceptions that changing the player styles under schemes to match your starter's styles did not raise the overall. I will say though, the 2nd player listings did not seem to work, in other words the 2nd RB did not respond to the 2nd RB setting but the first, same with WR's.
In those cases, you are probably better in most cases recruiting to existing style settings unless you are drafting or signing a new starter. In that case I say select best available and change the setting.