I don’t know for sure but I’m guessing it’s technical issues that prevent the implementation of Loadouts. Issue with deleting shaders, vaulting of content, limited vault space, all are down to “technical issues” I believe.

I want this. I don't want to have to fire up my PS4 to clear my vault, change mods etc. I want to be able to do this on the fly in-game, or from my laptop in the living room while hanging out with the real world people in my life (better yet, in my game room when I have time to myself to really focus on what I'm trying to do).