Redo was set to 100.  Turning it down made a huge difference.

With the new material assigned to the tongue it turns blue, but it does work better (maybe it's just redo set lower) for the morphbrush tool.  Is there a way to select certain parts of the tongue, because when I pull or push with the morphbrush it selects other parts of the face during the process.

The mag still has no effect.  As soon as the zone is expanded to touch any part of the face, it warps, but while only the tongue is in the zone nothing happens.