supremacy, I may be wrong but I think you can find 99% of what you dream off in Guild Wars 2, minus the keep housing, and to be frank, it's not working too well.
One day you login and you are winning the fight vs the other two servers, you give your best and your "faction" controls almost all the keeps and so on, on the map.
Then you go to sleep, wake up, go to work, get back and POW, you've lost everything simply because there were not enough people online to defend it.
How many disappointments like this do you think you can take?
Losing everything over night?!
For me, one was good enough to know that there's no point in playing that game at all.
I STRONGLY hope that ESO will NOT be anything like that

I like what Riptose said about housing, and I would add that player homes must be functional.
Make it possible for players to add house extensions that suite their class or something.
Get a chair in front of the house so we can sit and enjoy the bloody view!
Show some imagination hehe...