Is this beyond what draggers can do? Do you have examples of two pictures you want to morph between? The reason I ask is morphing between say a frontal and side view of a puppet would not work very well - the intermediate frames would look strange. If less radical changes, then you can certainly record draggers moving parts of the body around,, and you can do quasi keyframes as well using blends. (You can record the new destination then blend from the old to the new location to get a smooth linear motion). There is also the walk behavior, but it works with side views not frontal = frontal is harder because should you see the bottom of the shoe when it lifts up the foot to take a step forwards? There is frontal foreshortening which CH is not good at.
The most common solution for side views is to do frontal, left quarter proiflile, and left profile views by hand. You can add extra ones, but the auto-head turner based on web cam only supports a few angles - you would have to use triggers for the rest. Then you just flip between them.
But generic full on morphing is not supported. But there are often ways to solve particular problems suing “creative” approaches. I do walking towards the camera by doing a closeup on the torso so you cannot see the legs - just bob the character up and down.