Did he play "great" for a 5th year SR, probably not. Did he play "great" for a RS FR seeing his first action ever in an SEC stadium, most would say yes.
I went back and watched it again. He did some truly amazing things I don't think you give him credit for. Like the sack he evaded and then had the smarts to throw it away. Most QB's would have taken the sack but this kid was able to evade (how I don't know) the sack. He did overthrow a wide open deep ball by 5 yards. He overthrew Boston Scott in the flat which would have gone for a chunk. He threw an INT straight to a defender. I'm willing to overlook that in a FR making his first game ever. I saw at least a couple of incompletions that I'm sure was the fault of the WR. There was a route that I know was supposed to be a go route that the wideout stops quickly and turns around to catch, but the wideout kept going. It was in the redzone. He threw it right on the money and had the WR ran the route correctly it was 6.
He throws a very pretty ball and I think he's going to be a very good one for us before it's over. As far as who should start Saturday, I'll leave that up to HCSH and y'all to decide lol