I seriously doubt there will be an option to leave the throuple for Josy and Maya to be a couple. It's clear when not in the throuple that they are not going to survive as a couple. I can't see how it would be different ending the throuple and leaving them in a couple. There may be 4 options of throuple, solo Josy, solo Maya and full breakup, obviously full breakup would be a fail playthrough, for example if you took the restaurant offer from Quinn, failed to get the contract from Patrick and concentrated on Maya in the throuple so Josy felt left out, I think in that situation Maya would no longer want to be with you, Josy won't either as she felt pushed out of the throuple but she would also be upset with Maya for both breaking the throuple and for getting between her and MC in the throuple.