I've done a lot of simming myself... the major problem has always been that rebound ratings were not distinct enough across the board. This lead to no outliers with 14+ RPG, and most guards grabbing 5+ a game... So I've had quite the opposite experience.
Also in my own roster, I've got Lillard at a 83... I didn't go in and change the algorithm, I simply edited his ratings to reflect his inefficient scoring and subpar defense/playmaking.
Again, Hakeem is without a doubt underrated in those areas. Iverson is looking like he has his shooting and defense overrated as well (had him in the high 80s in my roster). I'd like to continue this discussion once we can dive into the individual ratings for '16.
I'll say this.. It's a lot easier to overrate a guard simply because of the
amount of individual ratings that are important to the position. So what 2K needs to do is try and get more ratings that favor bigs in the game.