Yeah, I think you are exactly right.
If you have a current gen console you're set get it on PS3/360 and have a blast, you just got the best 2K game ever made. Don't even bother with next gen, plus you're playing in a Las Vegas mega pool of players.
Next Gen though looks to be incomplete, no my team, and no crew mode, coupled with new tech for the XB1 & PS4 and too little time to know how to use the tech properly. This coupled with NBA Live attempting to swing for the fences, I'm really excited to see what they offer, cuz I sold my PS3 and already paid for my PS4, and since Live was only made for next gen, it should be a solid offering I hope.