I think the reality is... Rein will be under the microscope for next year with the inclusion of Havili. That's not to say he won't continue to improve or I'm into the Rein bashing as many others are. The kid has ticker but will need to move to the next level if he wants a contract for 2017. Personally, I hope he does.
Really he only needs to improve his ball playing and decision making to become a top tier hooker. You hope these things continue to improve with experience, however his service against the Titans was garbage and gives reason to be skeptical.
Defensively he would be one of the best 9's in the comp, and his running game is good too.