1) Have a minimum resource cut-off for taking *any* kind of long-rest (even partial)....though that might be good to tie in with the in-game difficulty settings. This would make the decision to take a long-rest even more strategic.
This is definitely a decent idea, but given the fact that companion interaction and a lot of story stuff is directly tied to being able to long rest, I would prefer they don't do that. If they change how they deal with story and companion scenes though, I don't think I'd mind at all.