Preface:
ESO is a great game!
The updates in ESO that have been discussed and that are being implemented are really awesome. In contrast, I started (and then stopped) playing Arche Age, which I thought might be interesting, but it's like switching from driving a fully loaded BMW i8 (ESO) to a standard Toyota Corolla (Arche Age). Okay, now for my wish list and suggestions:
1) Faction Specific Armor Sets: It would add a whole new element to the game if each faction had it's own armor sets. Ex) DC could have the "Lion Guard" set with buffs and such, but the armor set could only be crafted in select locations in DC.
Now it would be sweet to have this feature for a few reasons, faction pride, unique armor and a valuable trade commodity for trade guilds.
2) Faction Specific Items: Now this has been done fairly well with recipes for provisioning but is mostly a cosmetic thing, i.e. each faction has different types of recipes that essentially give the same buffs but are called different names. So it would be cool if there were some items that could only be obtained in a certain faction and it would give people more reason to utilize Guild Vendors, adds another layer to the game
3) More motifs for crafting like Fighter's Guild Motif, Mage's Guild Motif etc . . . perhaps tie getting these motifs into completing Guild quests or something
4) Brawling system
5) More activities to do at Inn's like brawling, or dicing, or some other aesthetic activities that will encourage player to player interaction
6) Open world PvP zones, maybe this is where the Imperial City comes in, I don't know, but it would be cool
7) More challenging Dark Anchors (this is not a priority for me, but I feel like there is something missing from Dark Anchor encounters)
8) Enhanced social interface . . . you know like when I talk to an NPC and the view shifts from third person to first person, let me do that with player character friends, make use feel like we can have dialogues with each other like other ES games, maybe even a four way face to face chat window for groups, this would greatly enhance Role-playing and maybe even trading.
9) Horse racing system, I hear this is in the works, but also need more cosmetic options for your horse.
10) A few more Sandbox elements to make players more engaged with the world.
Well, all that said, I am having immense amounts of fun with this game and I am optimistic that the game will continue to develop well and become more dynamic and engaging. I mean good gracious most of Tamriel is still to be discovered.