Make ToT a mobile app so I can play it against some NPC while I'm not at my desk. If I'm bored waiting at some office or whatever I'm playing some other mobile trash anyway so make it ESO-centric. Why? Few reasons. 1 - the mobile app gameplay generates loot that players have to login to the main game to claim. 2 - I won't waste time in the full client playing ToT anyway when I'd rather be questing or PvPing. 3 - Once you have a mobile app you can (optionally) send push notifications for friend logins or selected other events to drive up engagement.