A mock draft in Madden is an absolute must addition in my book. They also need to be much more in depth about the players. They need to perhaps write a paragraph of strenghts, and a paragraph of weaknesses like you might find on many internet prospect profiles. The idea of being able to try out rookies is a great one. Maybe use the training campp drills at the scouting combine to evaluate the rookies. I like the idea of a seperate rookie training camp as well.
They also could have an actually graphically represented draft, instead of just a list of players.