There are a lot of role play elements I think Hogwarts Legacy is missing. There's NPCs not having any sort of schedule, for example. Having major NPCs as party for more than just while in missions would also be cool. Of course most of these are such big additions that the scope of the update would have to be similar to Cyberpunk 2077 2.0 update, which is extremely unlikely. Something that they might be able to add, that I and a lot of others have been asking for since day 1, would be some type of New Game +. Though that could be difficult though since a lot of spells are tied to specific quests. That would be my number 1 hope if this update actually ends up being real.