More race/ class combinations
Night Elf Paladins in particular with a matching racial ability theme would be fantastic.
Human Druids possibly as well
Necromancer could be a fourth Warlock spec, or an entirely new class.
A Warden class would be interesting.
Being able to enhance your overall functionality of your spec would be an interesting dynamic, like enhance an ability to make a new ability out of it.
Like have Arcane Blast change into a stronger form with a different name and look to the spell effect, with different damage but at a cost of an overall change.
Similar to what we have now with some talents and PvP talents but more depth to it.
New dungeons and dungeons added more frequently
More selections added to the existing timewalking dungeons and raids.
More world content, quests that can carry on for awhile but have a deeper element of mystery to them, but can also be spooky. Like going further into the lore of Elune, or further into the draenei’s history.
We still don’t know where Azshara is at either.
I wouldn’t mind seeing the further stories of places like the Lordaeron Kingdom as a whole, like the healing and rebuilding of the “plaguelands”.
We still have other areas of Azeroth to see, maybe putting the follower system to use gathering maps and intel and some character quests will allow us to find a way to travel to it, once you do it on like two characters then it’s unlocked account wide.
Places like the Dragon Isles.
Update the existing pet battle npcs too.
Diving into the Emerald Dream in its entirety and seeing an undisturbed Azeroth could be something too, as well as possibly going back and questing and doing dungeons through a pre sundered Well of Eternity Azeroth, not just the tiny taste we had back in the three Cataclysm dungeons.
Addressing what’s happened with Draenor and Yrel needs to be done, I’m totally fine with there being some huge battles against her Lightbound army that takes us across azeroth throughout patches, both world events and instanced dungeon / raid related gameplay.
Gameplay indicated she had a dark secret, we never did find out what it was, perhaps it’s tied to where she is now.
There’s really so much to get into, and I have plenty more.
Like where do the other dark portals seen across Outland lead to. What about revisiting the Cenarion camp in Blade’s Edge Mountains where that girl mentions she was from England, implying she likely came through a portal.