I think the only way to rename things in game in the future, that we crafted or enchanted and misspelled, which I have done by misstake myself a couple of times, will only be possible if we get a good savegame editor, which we had for Morrowind. Editing savegames are often very risky though and its always a big chance something will go wrong when we do it. I dont recall if we ever got one for Oblivion or not but the one for Morrowind was very good for many things - but risky...