I didnt even take the chance this year to download a roster off 2k share, because the 2k devs continue to overlook these bugs every year, so my guess is the big is still there, but do not know for sure it is, but did hear some say there was issues, especially with created players in the roster. Created players will even effect your roster if you make them yourself from what I heard as well.
IMO the sim stats were tweaked and are better out of the box, but it definitely helps having editing rosters too. Touches, shooting frequency, is 2 key areas with sim stats. It always good to rate players accordingly too, as 2k has a tendency to overrate guys and with a few underated that arent big names. I have found lowering overalls helps if you like keeping roles and chemistry on.
Only stats that wasnt very good in team stat sims was turnovers were a little to low for teams, and team fouls were a tad low. In my roster I raised foul tendency on some players and that has worked, but probably Im seeing a few to many foul shots being taken now, so its tricky to get right. I was able to get turnovers a little higher by loweirng a lot of offensive awareness ratings. I just re started my Association so not sure how it will end up stat wise but so far so good, but I do play all my games with my team so it will take a while to get deep into it to know for sure how stats look.