The point is that there doesn't need to be more, or novel tech to tell a good story. If you copy paste the mechanics of baldurs gate but with a new location/story/characters, it would do great.
As far as I can tell their weakness is QA because their games have so many bugs it replaces the actual game design, but at the same time it seems to be their strength because people think it's funny, which must make it hard to change.
Bethesda's weakness has always been writing and content, though. Lots of it, but the main plots are consistently terrible.