I don't think that will work with Mantha. The kid is a natural talent. Best to get him into the NHL and learn the ropes there. There are limits to what you can learn in the AHL.
Something we're missing a bit I think is the fact that the Wings tend to let the smaller guys over-ripen more. It's no coincidence that Nyquist and Tatar both maxed out their waiver exemptions before sticking with the big club while Sheahan and especially Jurco seem to have carved themsleves an NHL niche a little prematurely by Wings standards.
Matha has elite size for a scoring winger. This alone should speed up his development.