I mean, you don't have to have a cannon to be a good QB. McSorley was a great quarterback for PSU and I wouldn't say he has even a remotely good arm; he just made good decisions quickly, threw it accurately and was a good athlete who could hurt people with his legs.
Based on the games, Adrian seems like the much-better option right now, but just because Luke was bad a freshman doesn't mean his QB career isn't salvageable. If our coaches think he should stay at QB, then I trust them. But I also think Luke should realize he can get on the field as a receiver right now and try to help the team while he waits to take over for Adrian.