There’s actually an existing feature suggestion that’s already focusing on this. Given it was created before you could have episode collections, it’s mainly focusing on movies. I suggest you comment/vote in that thread in order to avoid distracting/dispersing votes.
Unless my memory fails me, there also used to be a suggestion to allow collection specific titles (e.g .“The Two Towers” instead of “The Lord of the Rings: The Two Towers” when you’re already inside the “The Lord of the Rings” collection) – however I fail to find that one
