Add Posture Changeable 3D Models of Persons
If PowerPoint can add 3D models of persons (male, female, child, adult, etc.) and make the posture and facial expression of the models changeable and controllable, for example, a user can change the posture of a hand or change smiling to crying, then PowerPoint will become a very powerful tool for users to draw people's without need of drawing skills. The posture-change function can be designed in such way that no matter how crazy a user tries to change a posture, the software always results in a reasonable posture. For example, if a user pull the hand above the head for 3 feet, the result shows the hand is just above the head.
You can already do this in PowerPoint as latest version now accepts skinned animation. So you can bring in models with character rigging. If you do not want to build and rig your own models, there are various sites that offer rigged figures for free, such as Mixamo (www.mixamo.com). Mixameo offers full figure animations but if you are just interested in facial morphs, you can try the free 3d human figure applications DAZ Studio or Make Human