There's a defect because I thought that farmed players should be somehow worse than normal players as rookies. If a player has to have his "mentality" improved that could mean he's unskilled, or maybe he doesn't give it his all (which would be lower movement or possibly a niggling injury). Yes, this doesn't seem to leave a chance for that diamond in the rough that everyone wants, but I think that's what doubles rolls or stat increases in the farm system would represent.
I made my farm system up on the spot because of this thread, so feel free to make changes if you wish to actually try something like it in your league. It won't offend me, I promise.
Pink Horror