Sawyer seems like a very capable manager-type, but based on his track record, it doesn't seem like he has the artist part of it. To make great games, like any other art, you need a certain vision and level of creativity. Now, in his case, I don't know exactly what happened at Black Isle/Obsidian, maybe he was just constrained by circumstances and upper management every time (forced to use other companies' engines, forced to make nostalgia games, etc), but we just don't see anything in his history that shows that he can produce high level innovative stuff. His very best game, F:NV, was good because they essentially took Bethesda's open world formula/engine, and replaced some retarded parts (lore, writing, characters, etc) with their patented strong-points. That's not exactly proof of anything.
He might be better off working with someone more artistic, and handling the logistics/management part of it, while deferring on creative decisions.