im more talking about 2 and Inqusition. Id say DAO was still a bit niche. It didnt try to compete with the Open World RPGs of its time like Oblivion
Maybe it's just the people I associate with, but most people I know who played Oblivion also played Oranges too. In terms of overall accessibility, I'm one of those people who takes a while to get the hang of any sufficiently complicated rule set and can't say I found either to be more complex than the other. I liked the other Dragon Ages too, though I do think the introduction of The Awesome Button™ saw them lose something (I forget the exact comment, but something like "...and when you press a button, something awesome happens!") but still preferred them to Skyrim. Not so much because of gameplay, just that Skyrim felt soulless to me, which counted against it more than the game mechanics, "awesome" or otherwise.
