Sorry for the armpit, for the people who like hairy pube but not hairy armpit my mod is not going to be at their taste. But at least not every character has hairy armpit so you could customise your files to only use the image of the character who doesn't have it. It's probably a waste of time but if you really want it this is still a possibility I guess.
I add pubic hair to the character I think should have pubic hair(except the MC because I was too lazy to work on a male character lol) so not everyone. Of course it's my opinion and you can add pubic hair to anyone you like but I will not do it.
I will look the new version of the game this week. But yeah, wasn't interested in porn stuff in the last months. It was completed for the version of the game it was made for, I guess they're is going to be things to add and adjust.
It was not made compatible for the new version of the game but it's a possibility that it's going to work. Probably not still, and not without bugs.
I guess it's also not up to date with the latest Tribute mod(I didn't see if it was really the case but surely it is not).
About the merging, the big nipples mod is not my thing but if you want to do it, go for it.