Some of these have probably been done before, but here are my suggestions...
1. Please consider making hairstyles, facial features, ears, and all other such things universally accessible in the character creator or via aestheticion by both male and female viera/hrothgar (when the time for those comes). It would effectively double the available options without, I hope, too much work and take some pressure off about new hairstyles and things.
2. I know this one has been said, but it bears repeating... Please, please, PLEASE add alts automatically to the friends list on all other characters of that server and service account. This would solve so much aggravation with sending items to yourself and allowing alts to share estates and such.
3. Related to above... it would be nice if certain parts of progression could be shared by alts as well. In particular, things like mount speed, flight ability, beast tribes, and even DoH/DoL would be great for an alt.
I've already put in the time, effort, and energy of dealing with all those things on my main. It's a little soul-crushing to know I have to do it all again on an alt if I decide to make one. I understand the logic behind why it's separate now, but logistically it's getting a lot more time consuming to do a lot of things (particularly beast tribes) with each expansion due to the sheer number of them.