All innovation with BadgeGen is provided from Kyle, we have the permission to use it and re-implement as well as we can. We are not allowed to modify or add content. Removing those badges where we had technical difficulties is ok though.
I then doubt that BadgeGen will implement such badge, since they will have an issue determining what a challenge cache is. Besides this, I wouldn't mind such badge. Though I think it's hard to design, the amount of challenges are increasing rapidly.