No way — he owes them big time. Either he limps across the finish line and benefits from the lowered expectations, or more likely, realizes that a neat, satisfying ending is fundamentally at odds with the story he's been telling and retires in peace on top of a gigantic pile of money.
Personally, the most authentic GOT ending is Martin unceremoniously dying of old age without providing any sort of resolution, and I genuinely hope that is his plan.