Not that weird: 2k is just a video game; It could give you a teaser of what's coming, but just that and nothing beyond. Many more changes will come, 2k will update most of them and some will not. Plain and simple.
Well, I guess you are talking about the swingman jerseys, because the authentic adidas rev30 were just awesome and nike is never gonna match that. It had all the things that make a jersey great: layers, texture and thick embroidery. The swingman were just crap.