Beyond that, you can control what they call the
shapeIndex, which controls which point on the previous shape moves to which point on the new shape, which has drastic impact on the way the animation plays out, so you can make it smooth and intuitive rather than awkward and forced. Not to mention that can convert your typically-non-morphable shapes into a morphable shape for you.
They have a collection of examples to check out. You have to be a member of Club GreenSock to use it in production, but you can play with it for free on CodePen. I have a simple template to get you started.