Throwing in my totally unscientific, wholly subjective two pennorth.
I am actually fine with the male halfling model, except the calves/feet are perhaps too small.
And while I initially thought the female halfling model was poor, either it changed or I got used to it, as I’m playing a female halfling in one of my current runthroughs, and think she looks pretty fab. Though again too tapered towards the feet, and more so than the males. And though I selected head … 2, I think? … I do find some of the other heads unusable because they - or perhaps just the faces - are too big.
The fact that the female halfling heads aren’t proportioned correctly is, I think, supported by the fact that so many of the available hairstyles clip through them. Even the head that I picked and like, though less so that than some others. And I really hate clipping!
"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"