The MotM is a difficult one. I manipulate that a lot to try and keep my oldest player (striker) competitive, I'd say it works about 50% of the time subbing another player that's outperforming him, but it does tend to go to the top rated top scoring attacker.
Keeper being MotM is the fairest as that doesn't favour the 'best' teams.
Although that would be manipulated pretty quickly with players putting them on FK, Penalty and even playing them up front!![]()