It's nowhere near advanced enough to justify, but all I would need is:
>RP logic for every AI
>so not only are the ai bots filling in for players, they are also characters that affix themselves to the lore.
>think the generic NPCs that you saw with people during Legion, though those were out of consideration for the story, not actual RP
>daily schedules for footmen, peasants, shopkeepers, and even nobles.
>it's plausible for the Horde to invade Alliance territory and vice versa
>different leaders have different attitudes
>while grinding in shimmering flats you might get a random AI bot run up to you called "Courier" telling you that Stormwind City is under siege and to return ASAP
>you stop by Gadgetzan and you find level 60 bots on standby having a drink
>share your story and they accompany you back to SW
>you stop the invasion
>bonus points: for the first time you can use this system to roughly control the "time period" of the game, want just Orcs invading "Old Stormwind" toggle option to set timeline to First War

there's just so much that could be done that simply hasn't been done yet