NGL.
My most requested feature isn't housing, a new class, or allied races.
It's a new bloody UI for the character selection (login) screen.
I'm borderline OCD probably and have an army of 50 characters I spend way, way too much time organising in different ways. Only problem is, all we get is a long and boring list. I basically change my preference every other week and have to rearrange it, and I can never decide which my mains and my main alts are.
What I'd like is a new UI based on the character creation UI they updated in Shadowlands.
Preferably a number of clean looking icons/portraits, and not a bunch of text strings for class, location, etc.
Then I'd like a number of filters, both premade and customisable ones. I want to be able to filter my roster based on things like faction, race, class, professions, and so on. But also things that matter to me, like which characters I designate as my "main crafters" of the various professions, "main alts", "main bankers" for different purposes, and so on.
Then obviously custom character poses so my army can look COOL. Right now every character looks like a dork. It just stands there with a weapon unsheathed. Hunters look weird because their pets are just tiny little creatures standing beside them, so if you spin your character the weapon can actually show behind the pet in the distance. And it bugs the hell out of me that some classes have custom sizes, and that most of them have different backgrounds.