The ability to import and apply the object json save state data in the editor would work well at least as a third party type of solution.
People could make their own editor, probably in C3, and solve their specific needs.
This might also work to get a better understanding of what tools, and manipulation methods would work best, and therefor reduce a lot of experimentation for Scirra.
Im sure anybody who would make their own would be interested in sharing what they can as it it would be in their own best interest to see the editor improved.