I have faith that the coaches know what they are doing if they can secure this commitment and then not take a QB in 2018.
However, The elite teams in college football are NOT doing that. They are taking at least one QB every year regardless of starter or class size. That should indicate that the QB position is not an area that should be gambled on. If this QB won't commit because we take a 2018 QB, then so be it. There will be others in 2019 that will commit and look to compete. And if one or more decide to transfer, then so be it.