Originally Posted by KuroShiro
Ironically, DA:O (by almost all accounts) was a better selling product that Mass Effect and the best selling product in Bioware history at the time. They just didn't know that when they started development on DA2, and expectations for it were pretty low at EA. Hence the massive overhaul.
Oh yeah, I forgot to add in the "There's also a difference between a sequel being a bit different because a developer made changes, and a sequel being different because the publisher that recently bought said developer has some mandates."