Fitz could live without an elite RB. I believe Tua needs a security blanket in the backfield with him. I believe any position that touches the ball often has to be very important. I've watched too much football not to know what a back like Etienne would mean to this offense. You put a star RB in the backfield and watch how fast your o-line looks better. The d-line has to respect his great speed and shiftiness which helps the play action game which is vital. Add in 2 more receivers and watch this offense work. Tua doesn't have to run a 4.4 40, he just has to get the ball to his playmakers. He'll be great at that.