"You're extrapolating a lot of shit" fujiwara, again, I've seen so many shows that had this as a tagline to promote it, and the writing ended up being terrible. Too many to count, in fact. You could argue I'm just being paranoid, but it being the case more and more often these days is a pattern that's hard to not notice.
Also, why do they need to emphasize something we can see with our eyes in the image(when it comes to the PoC/asian characters and the disabled)? I don't recall them doing that for the first series of TD. They just showed promotional images of the cast, and basically said we were in for a fun ride. Didn't feel the need to emphasize squat, they didn't need to tell us they had their black characters in DJ and LeShawna, because we could see it, and they ended up being great characters that were entertaining to watch. Same with Heather, who filled in her despicable antagonist role nicely, etc.
Again, this next season could end up being good, but given the track-record of the last few seasons of TD content, and how bad they were, I ain't gonna hold my breath on that, unless the writers are either completely different this time around, and have a track record of making decent shows, or the previous writers somehow improved their writing ability drastically from its been in the last few seasons.
Your first point in no way counters anything. It just tells me you've witnessed the exceptions that ended up being good, in which case, good for you, glad you found those shows that didn't end up being a waste of time watching. And what you call 'whining' is more like my open concern for those characters being nothing other than tokens made just to tick a box. I'm sick to death of seeing that lazy-ass shit.
I'll watch this upcoming season of TD, just so you know, hoping that I'm wrong, and that the creators will do more with them than simply have them be a tick in the box for the sake of diversity and nothing else.