- Player housing, with mannequins, wayshrines, extra storage and crafting stations.
- Free travel to any area the moment you leave coldharbor. Don't require players to get on the train. More sandbox.
- Zone enemies leveled to the player ala Skyrim and Oblivion, not leveled by zone.
- Thieves Guild, Dark Brotherhood and Morag Tong questlines (the first two are rumored to be released soon, and the last is outlawed by the Empire but still would be fun)
- Relevant crafting stations and temporary living quarters in the Fighters and Mages guild, as well as any new guilds being added. They should feel like home to the fresh adventurer.
- A construction set for building our own quests, with limitations of course (random loot drops, limited resource nodes, GM approval), that we can share with others or our guilds.
- Visiting ancient locations, like Sancre Tor, Cloud Ruler Temple, Kvatch and Skingrad.
- Aedra and Deadra worship and skill lines.
- More in-depth enchanting crafting mechanics.
- Spellmaking crafting mechanics being added.
- Alchemy being expanded to include poisons.
- Vampire Clans meaning something, and the clan you are adopted/turned from determining your overall bonuses.
- Werewolf packs being important, and the pack you are adopted into providing different skills/howls.
- Gladiator Arena's being added to several major cities in each alliance.
Side Note: I actually really enjoy what I've played so far, and mean these only to add depth to the game, not imply that they are necessarily 'missing'. Though player housing IS missing and should be there.