Hill vs Siemian why is there a debate?

It wouldn't surprise me to see Trevor start against the Falcons, but with a big dose of Taysom at QB as well.
It would surprise the hell out of me that if Siemian is executing the offense, Payton started platooning him with Hill. I suspect that if Siemian gets the start, Payton will only use Hill in a situational capacity to minimize his contact and bring him back slowly. Then again, Payton is a super bowl winning head coach and I all I have is an opinion.