I would like to suggest that the free version of c3 should expand slightly to reflect the growth of the product. What was previously, say 50%, of the full version is now only a fraction. The sub-layer setup offers more but cannot be explored. Increase layers to 3 or 4. Enable the frame-shadow in image editor to spark that animation creativity, and open up the ability to create 1 or 2 limit families to let users learn the concept.
I an certain this would demonstrate the full product better while engaging the younger audience to become future clients.
Best regards
/Ocsid