Those wireframes look pretty good to me. Unfortunately, when it comes to cinematics or even just the standard party view with the eye in the sky, I think Larian's default camera (in Iso, or else pseudo-driving cam, but with a locked line of sight) means that they won't be able to do anything cool with depth of field or perspective distortion like they might if the game was more POV oriented.
You know, like trying to capture the feel of being extra tiny in an outsized world, where the chairs are all towering and the character has to actually look up sometimes lol.
I'm not a huge fan of exaggerated features or enlarged skulls, since I think it works against the whole 3e vibe at 1:2 scale, but I think it's also being done mainly as expedient here, because of the way they've designed their camera. The amount of detail in the faces/facial expressions that they're trying to convey is already keying off Human scale models for the default, where the human heads are about as small as one can make them before losing a lot of visual information in the process. Without changing the camera location or the camera lenses or the blocking or anything else really, then there is probably a downward limit on how small the skulls can be made, before we just start losing so much detail that the faces become generalized abstractions. Like I think that's why their heads are so ridiculously gigantic right now, so we can still register when they're smiling or smirking or whatever, but to me its not worth it. I'd take less detail on the faces, for a more interesting and tiny sense of scale, any day of the week.
Sometimes I think their modelling and animation designers are being way too deferential to the cinematography team and prioritizing the wrong things. Changing the shape of the model to suit the camera, when they should just be moving the camera, if that makes sense? I spend way more time looking at the back of my character's head than the front of it anyway. Clipping there is super annoying too. Not just on the Halflings but for all characters, that's where a lot of the clipping issues, distorted animations, haircut or equipment troubles seem to show up. I think the problems with their animations probably come from designing a wonky model with a wonky skeleton initially and then trying to animate it. Aiming to hit different animation marks like you showed in earlier pages, or how they are trying to make it so that the regular weapons models don't have to be rescaled by having huge hands or whatever. When what they should do is just 1:2 scale everything and go more from there. They could still do some mix and match reg equipment, or introduce a smaller scaled weapons type where appropriate among the bits and bobs. Especially with daggers and short swords and bows, include some that are scaled to look decent with Halflings or Gnomes. Seeing giant weapons clip through the body, or goofy cinematics in the opening where lines of sight don't match up, just contributes to me passing on the race for a PC. Especially if its already clipping in the Char creator, you just know its going to be worse in the actual game. I think its a confluence of many things contributing to make them not a top PC choice for me in BG3, but I think if they did it right Halflings would become at least as popular as Elves. Just need to make them feel more little-world, and then I think they'd see a lot more play.