I like this for the most part.
ROTY – It would be easy to select the player with the highest rating who's 1) on a team at the end of the season 2) 19 or under and 3) played in a league game. (They don't have to be drafted by your team.)
DPOTY – I like having an algorithm similar to MVP where defensive performances are "voted" on.
MIP – Player who was on a team's roster the whole season and has the highest difference between avg rating in 1st 7 games and last 7 games. That way it's consistent.
COTY – How about we give an award to the manager whose club beat all the other teams when it counted. And their reward can be that they get to step it up to the next level of play. We can call it "promotion" and they can get extra cash for it too. And we can give them a trophy for their trophy case that says they were better than all the other managers in that league that season. ;-)
re: "6th man" – This award has always seemed stupid to me. Most rosters have more than 5 regular starters if you're training at all, so it's really arbitrary. Thumbs down.