Darkfall has its problems, but there is a lot which makes it good, the great amount of sandboxy, sieges and amazing PvP system. But still, it's first (or atleast the most known) of the genre FPS MMORPG.

My point is TESO developers should test Darkfall and take the positive points of it (Probably at this point you will stop reading, I dont care, I just speak the truth not opinions even you might think so. Darkfall fails because of developers whom don't listen to community. Hope bethesda will.) and take the negative points as a warning. Also Darkfall is a finished game, it can be great role model for TESO if you so will (atleast for PvP side, but like I said, take the positive out of it). I am not encouraging to plagiarizing, but to use common sense.

Nothing else for now, hope you learned something,

Fonillius.