Here's my review for NBA2K15. tl;dr: It's terrible.
This is the worst ****ing game ever. Multiplayer is a joke. There are never enough people online to get anything going. It's a complete ghost town (maybe 2-3 players total) except for friday evenings, but then you can never get a spot on a team and you're sitting there with your incomplete team waiting for 5 years for more people to come. And then you have to wait for opponents.
No. **** that ****. This is like the game equivalent of the South Park "Line Ride".
Single player is decent until you get tired of doing the same thing against dumb AI. Then you crank up the difficulty and have to suffer from suddenly-retarded teammate AI. Or scripted gameplay where star opponents play like they have telekinetic powers. Sadly, you can't use The Force to combat this.
2k14 was actually fun as an arcade game. This just plays like a slower version with dumber teammates. The only good thing is perhaps getting 5 rebounds in a single possession after your player struggles to put up a layup from under the basket with an 80+ rating. Double doubles are a cakewalk.
So, yes, this game is extremely frustrating at worst, and at best it's repetitive and mind-numbing. They should really abolish the whole park affiliation thing for PC players. That would at least help the online play redeem the game a little bit.
And as far as all the other modes besides MyCareer and MyPark? Forget it. NOBODY plays the other modes.