Mine is this: no hood helms.
Plethora of robes with hoods and no hoods without robes....
What? Why, for the love of..? I wanted a hood for my main (scoundrel) since the day i started playing. I'm a thief, and core attributes of a thief are: stealth, backstab and a hood. Damn it, it's like a holy trinity of every sneaky class in every rpg that's worth mentioning ever in the history of ever.
Yeah, yeah it's not fantasy, no elves and orcs and magic rainbows and stuff, i get it, but still.
Man, having a hood without a robe would be so great.
That is all.
Oh, and also gtn functionality, i.e. dragging manually to sell, no way to specify the size of a stack i'm selling and so forth.