Finished it tonight.

I will say its not nearly as bad as I thought it was going to be.
The stories and dialog are okay.

However, it is still not that good.
It is worse than the later seasons of Kind of the Hill (post-season 7).
The animation is bad. Probably the worst complaint about it. I won't day the animation is lazy, but it definitely is less effort than when the show ended.
The thick outlined characters vs the normal background is jarring.
The animation is the same "less effort" as the two times they tried to bring Beavis and Butthead back. There really is now excuse for it.
The voices are worst for the most part.
Hank, Peggy, Boomhauer and Mihn are fine.
Everyone else is either worse, or miscast.
Despite Johnny Hardwick finishing the season it seems, he sounds robotic and phoned in. I don't know if its Johnny dying or he tried to sound older to match an older Dale.
Joseph's voice actor changed. Its not bad its a voice that didn't need changed that much.
Khan doesn't sound like Khan. I think they changed his voice actor to a gook to not culturally appropriate, and made him do a normal voice. Fucking gay.
Ted Wassanasong's voice is changed to, and there was absolutely no reason for it.
Bobby sounds the same, and thats actually one that should have changed. Nothing crazy, but Bobby shouldn't sound like a 13 year old boy like he did. They changed so many voices, changed so many actors, but they didn't change the one who aged the most.

As for the stories. Meh. It wasn't too heavy handed in its liberalism, which I was afraid of, but it did do what I expected. Too much "look what changed while we were gone", "how do you do fellow kids".
I don't like Chang being Bobby's boss. I don't like that Connie even tried dating him. I don't like Connie being an open relationship whore.
I know that all the king of the hill chatactera are adults now, and all the fans are too, but I didn't like how "adult" they made it. Now the chatacters talk about sex more and swear more.