>>2793260I don't have the most current version of BP, so I cant compare them directly, but comparing the screenshots I can find with the VV models, they look about the same, if not a tad bigger in BP. Top left is a picture I took in VV, right is a relatively recent screenshot from Holden's twitter, bottom left is the two overlaid and bottom right is the silhouettes overlaid. The perspective isn't exactly alike but I sized them about as closely together as I could using the size of the head, whatever difference it makes is probably tiny. You can clearly see that the legs are about the same. Perhaps they seem thinner to you as they are contrasting their larger chest and slightly wider (I think) hips, which I wouldn't blame you for.
In regards to how theyre bustier in BP, I personally don't like that theyre different from the vanilla proportions there, but that's not what we're talking about. I would prefer for the models to stay as close to the originals as possible, and from what I can see if the BP legs were any thicker they would be moving further away from that.