Okay, I agree with you and I thank you for your feedback.
However there are some things to consider:
As the characters differ in size, bone length and other things, people would have to adjust the parts first to match the animations.
Let's take the example of the wizard girl holding the axe instead of the staff, the glow effect of the axe would have to be repositioned onto the axe, as the axe is a lot shorter.
What would a character pack consist of? Only the precompiled sprites together with the source files of the skeleton and the animations? So you would have to purchase another character that wears an eyepatch if you want your toon to wear one?
Or would a complete character consist of all possible parts applicable to him, already resized and worked into the source data?
(Of course the would have to be various different attack animations for each toon, as you cannot stab with an axe, compared to a dagger,...)
I really love the idea of heavily customizable characters, I just don't see how this could be done for high-res sprites of that kind.
*Edit:
I discovered a kickstarter project named "Indie Graphics Builder #2":
The characters can only be composed of different parts because they have all the same basic doll with the same shapes and sizes.