Earthtear Cavern demands a few upgrades to ESO to be worthwhile:

1) The ability to have a piece of furniture slide out of the way on command (preferably by clicking on a nearby bust).
2) The ability to click on an item (preferably a pole) in your home to be transported to Earthtear Cavern (and from Cavern to your Manor)
3) The ability to leave the cave through the opening, preferably while traveling on your black horse.
4) A detective personality
5) A giant coin
6) Gear that includes a cowl, cape, and utility belt.