I know. They (Obsidian) can use the Creation engine (which they get from Bethesda), but Bethesda should not write it since their writing skills come nowhere near to that of Obsidian (IMO). Chris Avellone should be writing it, for the most part, and not Bethesda's own writers. Basically IMO Bethesda should stick to Elder Scrolls and let Obsidian develop all the future Fallout games, but using their (Bethesda's) tools etc.
At least there is Project Eternity to look forward to from Obisidian as well...