While gameplay and graphics are indeed very important aspects, most people who have issues with NBA 2K14 NG are complaining about the legacy modes: MyGm and MyCareer (with online being very problematic as well). A person can only play so many quick games before they want the games to actually mean something. That's where sports games long-term appeal comes into play. Most would argue that those modes were better on CG and that most 2K14 fans would have settled for a "lame port" with NG graphics.
I have NBA 2K14 on the PC and the PS4, and the PC version is the more complete game, and that's despite the PC version missing some features that were on the CG version.