Let me just start by saying I love this game, it is a very good looking game and I find the story line great but I am getting very bored very fast at endgame as the content is proving to be very limited. Now I know the game is new and yes ZOS is so far doing good at getting new content out fast but so far it is seemingly going down the SWTOR road and I didn't even make it to 12 months in that game. Like ESO I loved levelling through SWTOR, I loved the story and I enjoyed the mechanics but come endgame it felt more like a limited repetitive chore.
Now by more content I don't mean more trials and more dailies, I mean more things to do. Stuff to kill time while I wait for my guildies to get online, some solo content other than farming, pvp and rolling alts. One can not always just do group stuff like PvP and dungeons, it gets stale and repetitive and I am sure as hell not going to pay a monthly sub just to log in 2 to 3 times a week for a guild trial run.
Give me mini-games like puzzles and artefact hunting, give me a more in depth achievement system with a bunch of rewards like costumes and mounts, GIVE ME GAMBLING!! I mean seriously, I find it kind of hard to believe that the Khajiit haven't come up with some kind of card or dice game to swindle people out of their gold.
Housing is a great option, I spent weeks building stuff in RIFTs dimension crafting, there can be things like rare trophies to hang on your walls and stuff that will get people our exploring and hunting. Say there is a rare spawn bear that I can kill, skin and turn into a rug.
Anything other than stuff that requires a group or repeating the same quests.
"Fear leads to anger. Anger leads to hate. Hate leads to suffering" - Yoda