If you simplify the lore too much, you risk alienating the existing market/fanbase of TES fans. If you make it too lore-dependant, you risk scaring off newcomers to the brand.
I'm not talking about simplifying the lore just certain things might sway against the lore but you have to remember TESO is set 1000s years before any of us have even come across TES lore,the world might actually be alot different than you find in single player TES games.
Of course we will be in a TES game but don't expect everything to fit into the lore of DF-MW-OB-SK.
I don't think you realise just how many people play MMO just to play an MMO and not really the lore,this is what you need to understand,we are talking an MMO not a single player game.
Seriously, you might as well be upset now rather than later,but saying that,the devs are not silly,they will keep it as close as possible,this you will have to except or don't play the game.