Now that you mention it, yeah, none of Utatane's art is present here. It's 100% Yamashita. I didn't even realize that. I get the feeling a fair bit of his chapter art was omitted too but I'd have to do a direct comparison to be sure.
It just hit me: the character art in the back of volume 1 actually shows us what Shinji's new plugsuit looks like! It's just a black and white illustration, but hey, it's something.