Yeah I think the idea of them turning on one another would work great in a tv series version of Star Wars, or even perhaps if the film series went up to 9 so you could have a little more depth. But as it stands I think to do that idea justice you would need to give it a bit of screentime, and in doing so it would lessen the sequence where the Death Star goes bang, as that is pretty much the symbol of the rebel victory.
In theory I like the idea though, I just don't know how we could do it without messing up the pacing.