Shoulder Rigging

Half Life

I have been exploring the posing possibilities with stock V5 (working from photo ref) -- a few times I've run across a bit of an issue in the shoulders.

Basically the issue is the existing "limits" do not allow for the full range of motion the should girdle is capable of -- however if I turn off limits and make the adjustments you can see the area becomes very distorted. Looking at the problem I think this may be a limit of the modeling or the rigging or both...

I'm not sure if a workable solution for these types of scenarios exists already, or if I just need to avoid such poses (or manually adjust/sculpt after posing in another package).