Rig issues with breast-mod

[thisismyrealname]

So I have this relatively old mod that increases the maximum size of female sims chest (B.C_Breast.package, published by PinkSimz on SFS) and at some point it started to cause visual issues with animations from wickedwhims (it took me a while to figure out this mod was the cause). I also made some body sliders myself a while back and unfortunately, no other breast-altering mod looks natural with my sliders (I would rather accept the animation-issues than try to re-work those sliders, also they are definetely not an issue for animations). The animated tongue is not in the right position and some animations make the upper body "shift" right and left in an unnatural way when the breast-mod is installed. 

 

Now I don't know much about modding but I wonder if there might be a way to use this mod, without having it influence the rig/bones for animations (if this is the problem)? Or maybe it is possible to overwrite the rig/bones positions, so they would equal un-modded positions?

 

Perhaps what I'm saying doesn't make much sense but I would be happy if someone could help me with a reply.

Thanks in advance.