is there a way to increase the size limit?
Yes, you can open the characters in notepad and alter the numbers once you know what to look for. I just found the breast size limit and put it to 200% and it functioned in game. I mean, I assume it'll fuck up clothes and cause issues with the animations and physics, but you can do it.
Look for ""BodyShapeArray":
The stuff after that is how you can tweak body proportions. Just alter a number in there and save it, load it in game, and you can see what was changed. Easy peezy. It should be noted that they don't go in order, the first value changes overall muscle, the 2nd changes arm thickness, it skips abs until later. The head/height type stuff is around line 7-8 I think. Though the hair can be too small/large for the head, I haven't found the hair scaling yet (If somebody can find it, let me know where it is please).
1-2: 300% breast size, lmao. This is too fun, I'm gunna fuck with stuff in here and see what I can mess with.
3: Extra thick thigh elf. Doesn't look too bad at about 150%
4-6: Large girl vs smol girl vs very smol girl. I'm surprised how well the penis lines up with the vagina in all animations, impressive. Holy shit even the very smol version works in doggy sex.... The dick disappears a bit during cowgirl and it's a bit off during missionary, but it's not terrible. When you can break the game far beyond what you should be able to do and shit still works, 10/10.