I think the exploding mesh might be due to the original mesh being to low poly in the region you are trying to morph. I've been noticing this with Tweety's Low Polygon girl. Trying to add some morphs with her subdivided and using the morph brush. When I see an explosion I dial back down the sub-d and see there isn't really enough vertice points on the original mesh in the area and the brush is trying to grab different points.

--------------------------------------------------------------------------------

Consider me insane if you wish, but is your reality any better?