Okay, at first I thought it was just me, but honestly, now I think this art just objectively sucks.
Yeah...I mean I've seen worse, but this isn't great. His turtles look a little...puppet-like, if that makes any sense? I think this artist works okay with horror stuff. Venus and the various monsters look suitably horrifying. But the Turtles and the humans all look a little off. And like you said, the proportions are off, too.
Mind you "ugly" art can work for the TMNT, I think. But... I don't think this is "cool" or "stylish" ugly. Like other 90s gross out stuff like Madballs or Garbage Pail Kids or Skeleton Warriors. This is just slightly off-model enough to be off-putting.
Unfortunately, I think this artist is the the main one for the foreseeable future, if the solicitations are accurate. I can only guess they're fast and dependable.
Tempestra was a one episode wonder. The excuse for her summoning Tokka and Rahzar was that it wasn't really them, just holographic simulations of them.
Technically, a TWO episode wonder. "Leonardo versus Tempestra" and "Night of the Rogues". She's a video game character come to life, so it's actually pretty fitting to have her show up in a video game. She shows up again when Shredder replaces Beebop and Rocksteady with other more competent characters, so...actually it's a little fitting that she summons Beebop and Rocksteady's "replacements", too. She also seems to have a crush on the Shredder in that episode.
Yeah, I had to look her up, too. It's a PRETTY deep cut.