Obviously quality should be a leading factor for this game but having played Baldur's Gate 2 and Neverwinter Nights 2 lenght of gameplay goes hand in hand. However I feel that quests should be linked more then they where back then, some random quest which makes you run to point A-B and pick up X/kill Y isn't really interesting.
Make the quests ramp up more and add to the epicness feeling, draw the player into the story and give us the feeling it is actually leading somewhere instead of having a main line with some character chains and the rest as content stuffing. Heck you could even inne