Here are a my ideas to improve ESO. A lot of these ideas deal with the houses as they are expensive and yet don't do very much.
1. For Homestead. Mannequins for different armor sets. And weapon racks for the weapons. So you can show off different styles a player can craft, or store them so you can switch depending on what you want to do. Such as P v P, P v E, thieving, or dungeons.
2. Two new weapon skill lines. Unarmed and One Handed. One handed is where a player uses a weapon in one hand and leave the other hand empty. One bonus could be that magic attacks work better. Unarmed can give bonuses to either brawlers or mages.
3. Being able to marry any available NPC. Some would need major requirements, like Queen Ayrenn. Others would be easier. Connected to this would be a follower like a Pawn from Dragon's Dogma. This idea is for players, like myself, who can only play ESO at a random schedule due to work.
4. Storage at the house we can buy. With chests, barrels, crates, cupboards, drawers, etc. Storage! At least I am not asking for being able to adopt children. For none exist, why is that? Maybe make a quest of this? Someone took them to keep the children safe. Maybe a Daedric Prince?
5. New quests for the Fighters Guild, Mages Guild, and later the Thieves Guild and then the Dark Brotherhood. Also bring back guild ranks.
6. Being able to craft rings and amulets. From iron to rubedite. Anywhere there is a place to do some blacksmithing.
My Characters.
Mike Snow - Imperial - Templar - One-Handed and Shield - Tank - Daggerfall Covenant - Commander.
Catelyn Rivers - Breton - Sorcerer - Destruction Staff - Daggerfall Covenant - Telvanni Magister.
Ashara Sand - Redguard - Warden - Two-Handed/One-Handed and Shield - Daggerfall Covenant - Heroic.
Tormund gro-Largash - Orsimer - Dragonknight - Two-Handed - Daggerfall Covenant - Furious.
Lysa Rivers - Breton - Nightblade - Bow/One-Handed and Shield - Vampire - Daggerfall Covenant - Brassy Assassin.
Jon Karstark - Nord - Dragonknight - Two-Handed - Ebonheart Pact - Drunk.
Arya Sand - Dunmer - Dragonknight - Dual Wield - Ebonheart Pact - Assassin.
Sansa Snow - Impeial - Warden - Destruction Staff/One-Handed and Shield - Ebonheart Pect - Swashbuckler.
Jojen Reed-Walker - Argonian - Templar - Restoration Staff - Healer - Ebonheart Pact - Melancholy.
Alys Karstark - Nord - Nightblade - Bow/Dual Wield - Ebonheart Pact - Minstrel.
Nymeria Woods - Bosmer - Nightblade - Bow - Aldmeri Dominion - Thief.
Brandon Wings - Altmer - Templar - Restoration Staff - Healer - Aldmeri Dominion - Scholar.
Lyanna Flowers - Altmer - Sorcerer - Sword/Destruction Staff - Aldmeri Dominion - Duchess.
Marvolo-jo Riddle - Khajiit - Necromancer - Destruction Staff - Aldmeri Dominion - Deadlands Firewalker.
Obara Woods - Bosmer - Templar - Bow - Werewolf - Aldmeri Dominion - Cheerful.