For me, it was a lot better than just ok. Centre-half remains one of the hardest positions in a football team, and Batth put in an excellent and mature performance for a debut. He was up against possibly the best strike partnership in the division currently, and gave them very little. In particular, his positional play was sophisticated, constantly looking to take up the best place to cover and to receive the ball from. There were a couple of slip-ups, but no more than you would expect from any centre-back in a game like this.
The one more serious mistake was making the wrong call for Nugent's goal. He was trying to cover for Foley as well as jockey Nugent, but ended up allowing Nugent too much space to shape his shot. I am sure when he looks at it again, Batth will see that stopping Nugent from shooting should have been the priority in that situation.
But all in all, v. impressed. I hope Saunders sticks with him now, even when Johnson returns from suspension.