Is Kellen Moore not impressed with Rattler?

57% comp., 4 TD, 5 INT, 40 QBR... 0-5 W/L.

On its face, there's not much to be impressed with. He absolutely needs to bring in competition there.
I heard Ewers did better against SEC competition than Rattler did. If Rattler gave us some small chances and showed some flashes but couldn't handle increased pressure, imagine what Ewers could have done as a backup.