1. More impact in melee combat.

2. Shields with aggro % on them.

3. Class Icons in dungeons to be clearer (Sheild icon for tank, cross icon for healer, sword for dps.)

4. Global Auction House or Allaince based Auction House in Cyrodill.

5. Better reasons for holding onto keeps in Cyrodill.

1 yeah sure, would be nice eventually

2 would be really cool and make tanks useful (or atleast more aggro SKILLS - not just shields with some on it (but maybe both would be cool)
3This wouldn't really work - cause the majority of players I feel will be a mix of 2 or more of those 'basic classes' - but it would be cool to set if you WERE a dedicated w.e
4 oh god please no, auction houses are horrible - every item eventually becomes cheap and easy to get in comparison...rather than practicing and getting really good and running the master-dungeons with friends/guildmates/randos and going through these TRIALS - then EVENTUALLY getting that purple/yellow item will be SO rewarding...or you can just buy it from someone who's better than you for a bunch of gold... So dumb.
5 dunno, didnt do PvP

5. http://www.youtube.com/watch?v=A8yjNbcKkNY

@op Referring to nr3

I am pretty sure there will be alot of addons for players that want numbers and tank and names and other ui changes to be displayed http://www.esoui.com/addons.php

1. Yes please.
2. Mods.
3. Mods.
4. Not gonna happen. Best thing to hope for is a mod that creates an accessible interface to see what each guild has on their AH, then you can join that guild to purchase.
5. Gotta hold a keep and claim it for your guild to have an accessible guild AH. Gotta hold 6 inner keeps to gain Emperor. Gotta hold rear keeps to retain travel network. Those reasons not good enough?

1. Targetable allies for reliable healing (not the AoE healing)

2. Customizable guild ranks (As an example, Officer or recruit can be customizable to Senior or staff respectively)

3. a lot of instanced and challenging dungeon

4. Improve AI regarding the throwing oil and litting fire of archer (better if it is simultaneously done or had a delay *not so much* before the fire archer trigger his attack)

5. You can have a guild store by not having a keep.

On 5: You can, but it's not accessible to the public, only guild-members.

Nice. I did not know that.