Why does our 5'6" receiver not do more comeback routes?

I might be wrong but I thought they said during the broadcast that Jamies didn’t have the touch or just didn’t like throwing to RB out the backfield
I think that is a fan narrative. Besides the best set for that option route is Kamara in the backfield but in a wide set or closer to QB with motion and then the option route, which is upfield and a cut based on the defender position. It’s not a flat pass or screen.