Or perhaps they could take the Fallout route and add a keyring to your inventory, which when selected shows all the keys in your inventory.
I'm guessing, and hoping, they'll do that, I really see no reason why they wouldn't. I'm guessing that in Morrowind and Oblivion, they never thought of having a keyring, but they saw mods for it, and thought "You know, that's a pretty good idea!" so they did it in Fallout 3, and why would they change it back? It's not like anyone played Fallout 3 and said "Keyrings are a terrible idea! I want to have to scroll through dozens of different keys in my inventory!" It would seem entirely pointless to remove the idea.