I'm more concerned about how locking in one party could be a problem mechanics-wise. To me it just feels like there are too many roles which need filling for four people to handle well. That's tricky enough in EA when you can swap people out in camp, but if you've got just four and that's it, that's a lot of hats to wear, especially since it's not clear how much control you can have over an Origin's background proficiencies. Multi-classing has issues because it slows progress in class advancement.
