There are a ton of small UI improvements they could do. This would be an excellent addition IMHO. I would like the ability to reorder my characters on the character selection screen. I am in the habit of using that to show which characters I am playing the most at the moment, which ones I might delete etc, and have done so in other games. I would also love the ability to attach a note to each entry in my friends list so I can remember why I know the person, and while we are at it, have those friends who are logged in at the time I open the list show in bold text.
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Sneev (SM), Rhejan (Hunter), Skraeling (Warrior), Fulkk (Healer), Erlennd (RM), Hasting (SB), Nithling (Cave Shammy) - 50s
Hratlann (Skald), Grimstainn (Shaman), Sighildr (Valkyrie) - up and coming
Asarna's Arme