Quote - odf: you mention them moving like a rubber sheet? So basically you don't want the edges-vertices bunching up too closely together in any one spot, yes?

That depends. For some morphs you might want the bunching at some spots, but otherwise, yes, you'd try to avoid it. But it's more general: let's say you have three vertices in a row. Then you want them to move as a row, not individually at different speeds. You don't want your edge loops turn into zig-zags, or some edges within a loop go in different directions from the rest.

I can't express it very well, but I think you know it when you see it. You want it to look like the vertices move in a organized way when you animate the morph between 0 and 1, not just the final shape to be right.

-- I'm not mad at you, just Westphalian.