Thank you, and honestly, that's totally fair, and we apologize for the radio silence in that regard.
We're considering ways to fix this preset editor right as we speak, as well!
As for adding new things, one of the main challenges is legitimately how convoluted the export process for parts is in that regard...So if the recode for 1.3 works smoothly, then adding new art will be more accessible - not just for us, either, but for users as well, and that is going to be our main focus, before shifting back to adding more content.