As long as there is a construction set I'm fine because I wouldn't buy another TES without mods, but what I want stock TES to fix is the quest writing, and the quests in general - I just didn't like them, the only fun one I thought was the "Who Dun it" one where you kill everyone at that party without noticing and some Thieve's Guild and Shrine quests but other than that they were more of a ... "Good on paper" kinda thing, but once you played you realized how much they sucked since there were just a few ways to handle each quest, most of them were dungeon searching, and then once you finish the quests, congrats, you are the leader of whatever group in the world you were doing quests for. I became Arch-Mage, Fighters Guildmaster, Arena Battlemaster, Grey Fox, Leader of the Dark Brotherhood, Emperor, THE GOD OF ****ING MADNESS, I'M A GOD DAMN DAEDRIC PRINCE! (Shivering Isles, which had much better quests btw, almost though, but not quite) yet I am hardly skilled in ANY of the reasons those guilds exist for (example: An Orc as an Archmage, or anyone as the God of Madness) - the choice was pointless, it's either "get this reward, but other faction will still do what you want but with a frown on their face, or get this reward, and that faction will have a smile on their face...oh but those guys wont...doesn't matter though, you can bribe them all".
-and this goes without saying but more fucking voice actors please, if VTM: Bloodlines can hire 53 voice actors then bethsoft should be able to hire 100.
last but not least, NO LEVEL SCALING, I shouldn't have to get a mod for that. Level scaling made the game make no sense (I'm supposed to close oblivion gates one by one all by myself but guards are 15 levels above me at all times) AND too easy. OH MY GOD KVATCH IS OVERWHELMED WITH....Scamps? Fucking SCAMPS?! I'm saving the town from SCAMPS?! I can kill these things with my dick, and I'm a mage... a female mage... (oh and a better leveling and skill system for sure, Oblivion is pretty much an RPG with damn near no "RP" in it)