I agree with the idea of his new sprites being anatomically correct. The biggest differences are on his face. And admittedly, I wasn't sure about them at first either. I did a new playthrough but put it on skip mode and just watched his sprites as they went by. I'll admit his looking from behind sprite is not great, and the style for it is a bit jarring (almost like it doesn't really fit the game it's in, they're akin to something I think would be feasible to see in Echo), but one thing I do like is how subtle his facial expressions are. Scroll back and forth between dialogue where he goes from neutral to angry, for instance. The eyebrows barely move, but it makes sense with Carlos' character for him to not have extreme facial expressions. I personally like the new sprites, a good addition to my favorite character in the game.
Yeah I did skip a lot to see his face and I scrolled back and forth, and it was interesting to see the difference. Before, his expressions were very direct, but since Ben would always describe his face as "that same (insert term for face) he always wears" or something along those lines, I feel like that piece of Carlos' character is shown a lot clearer, which is good :)