A few ideas for ESO

Caldwell ' Platinum: replay the main story at VR 12. Enemies are VR12-13, bosses 13-14. Get new/better loot culminating in a legendary weapon/armor and a loot chest containing hard to get materials.

Hireling Missions: Every once in a while, along with your daily items, you get a mission to rescue/help your hireling. Upon completion, you get more materials of higher quality than normal and a chance at an armor item part of a special set geared toward crafting. (Think set bonuses like less materials needed to craft, 10% chance to craft item at green rarity, +10% chance to boosting rarity, etc.)

Cheese Wheel mount: Special mount from Sheogorath. Could get it from a Sheogorath quest, or crown store.

Color Change for Costumes: Want to change it to a red wedding dress? Maybe a yellow and red jester outfit? Maybe a pink ordinator? Well, why not?

Player Houses: A house in each city that can be bought. Minor customization. When you enter you go to your house, you can go to others when invited or invite others to yours. Store items, display them.

Guild Hall: Similar to Player House, but on a guild scale.

Comments/ideas welcome.