Well, it's just that the JSON Export does seem to successfully preserve changes made with the Warp tool, since the 3D Viewer displays the changes I made. Would you be able to save yourself time and effort by using some of the import code from the 3D Viewer to implement a make-shift Load feature? At least as an intentional hack until you make a full Save/Load feature.
Of course, I recognize that this is software which you're sharing with us for free, so I don't want to ask you to do work that you don't have time and energy to commit to. Although, if you could estimate how long implementation may take, and let the community know what sort of rate you would need per hour to live sustainably, I think some fans of your software may be able to reach that target. Is there a way to contribute to you directly through itch.io or another site other than Patreon?