Even ignoring all the major, major problems...it's such a weird show. The episodes are so disjointed because there's not much of a storyline. The original SATC had arcs that ran for a long time, but it also had short plots that resolved themselves each episode, and AJLT is missing that.
I also just don't understand how they all woke up one day and decided they each needed a black friend - it would make a lot more sense if those friendships had developed in the unseen 15-year period. So for example, instead of Miranda randomly going back to college, Nya could have been a partner at her firm with 10 years of friendship under their belt already.
That would also make a lot more sense, because really, imagine your professor asking you out for coffee(!), trying to fleece you for money for their pet project(!!), then telling you about their struggles with infertility(!!!). I'd be asking the university for my money back, no way in hell would I let that woman mark my exams after all that!