Worse thing that Zenimax/Bethesda every did was put all their marbles in the Windows Live thing with Fallout 3. I'll play Broken Steel when it comes out Retail on disk like the first two expansions did.
Other than a bit slower than your average bear when it comes to patches, Bethesda can do no wrong by me (consider me a proud fanboy). Oblivion totally changed the type of games I'm interested in.