How come there were no such complaints when Bethesda made Fallout 3? It was made using the exact same engine as Oblivion, but it was universally a hit with little to no complaints about it being different to Fallout 1 or 2.
There were resounding complaints about Fallout 3 from all the old Fallout grognards. If you went to like, pre-existing Fallout-specific spaces on the web, the salt and rage was biblical.