How would they nerf him? For me, the cellar only spawns about 50% of the time.
[18:47:30.931 N] [Icool's Sarkoth farm helper v0.1] Cellars found in 41/81 games!
They beefed up the route on the way to him, the only thing they could do now is lower the spawn rate, or make him attack anyone shooting at him. The GPH from him isn't much better than core and other places though, I don't see a reason to nerf him.