The game wouldn't be finished if he was still working on it, you're simply arguing that the order of how content is added to the game should be changed.
From;
old scene > revamps + new scenes TO old scene > new scenes > revamps
But the revamps have often been new scenes themselves, I don't think the order in how he does things matters all that much, besides the amount of work and effort remains the same regardless, so we'd all be waiting the same amount of time. While still getting new scenes at roughly the same rate regardless of how he implements revamps.