Skeleton - marketplace compatibility + SK_mannequin

As you probably know if you worked with the mannequin at all, the starting angle of one of the shoulder twists is off.

Changing this angle in your base skeleton would mean damaged compatibility with marketplace content (which I believe is the reason the epic team never bothered fixing it).

So, I suppose my question is, are we going to just continue to have to bring compatibility to an incorrect skeletons forever, or are we going to buckle down and fix this?

What is the popular opinion, and what does the Epic team think about this?