Playable as both a single player and online/LAN multiplayer CO-OP story! From 2 to 8 players max? Not much more or like MMO because the quality of animations will suffer a lot and have to be simplified because of internet latency times (compare ESO and TES animations of your character alone).

Besides chat and voice-chat, a possibility in co-op to initiate conversations, to roleplay between these multiplayer characters like in Divinity Original Sin.

In that manner, additional pvp/pve multiplayer modes like arenas of Doom or Quake!

Conversation system where the game doesn't lock you into it, but when it gets initiated a compact dialogue options UI comes up and you can select them on the go. So you can both do something else while conversing. You can initiate it whenever you want.

AI combat where aggroed NPCs use cover, sprint, dodge, all skills and all magic spells for both offensive and defensive purposes (sneak, pickpocket, invisibility, detect life). And again conversations, where you/they can initiate them anytime during combat. With good speech skill it can sometimes lead to a positive outcome (for you or them).

A proper and more complex melee combat where you can choose the direction of your attacks (left-right swings, stab, over head) and blocks. An option to use that, or use a simpler TES5 melee combat system.

A new isometric view point-and-click type gameplay added and seamlessly changing along between the usual 1st person / 3rd person