Well, this is a wish list, so I'm going to post a complex wish
I suggested Euro-stashes already, as a means to give the draft more relevance outside of the lottery. I think it goes without saying that the deeper the draft/player development process is, the better the whole game mode is.
One idea would be to incorporate some version of the Bust/Bench/Star% model (created by Layne Vashro, I believe). Right now in the game, we know how good a player currently is and how good they could potentially become. We don't know how likely a player is to
actually reach their potential...all else equal, two players that are equal in current ability and potential have exactly the same likelihood of reaching their potential.
There are some guys in the league who have a high likelihood of being total busts, but also have a chance to become something special...one example would probably be Zach LaVine. These types of players--and others--are represented reasonably well in 2k currently (I know work has been put in to make the potential/development process more realistic, I don't mean to discredit it) but I feel like there's still another dimension that we're missing for realism. Especially with the increased ability to micromanage our prospects' development process, there doesn't feel like enough surprise and intrigue when it comes to drafting and developing prospects. This is one (relatively vague, I know) idea to help with that.
Sorry if I rambled too much for a wish list post. I already made a bullet-point post, I had to get at least one of these in here