Glad you're enjoying it. Thank you!
Re: breast rubbing and grabbing - it's on the list of things to do, but it will be tricky and the result likely imperfect. Due to customizations breasts can be different sizes, a thing animations can't really tell, so it will either result in a lot of clipping or in hands hovering over smaller breasts.
I know there is IK, but I have no idea how to do it at this point. I will for sure look into it when the time comes.