One thing I'd love to see is companions being able to build their own homes. The kinds of homes each companion would build, I can imagine, would be rather different from each other's. I've tried all kinds of things to leave companions in settlements and make them a part of it (I really can't adventure with all of them, or I don't want to.) But even with all those console commands I've googled and read about to try to get it to work, it's inconsistent at best, trying to make them a part of a settlement. They maybe sort of sometimes work some jobs, but maybe not.