I can’t reproduce the mix-up here (3D elevation and truchet are what they supposed to be on my machine).
The changing of random parameters every frame/re-render is built into G’MIC, I can do nothing about that.
The “note” display is a problem with Vegas, removing them would break this feature in other hosts.
The undo also works fine here, please write the detailled steps to reproduce the error you mention.
As for your collaboration idea: The sources for the G’MIC OFX and AE plugins have always been up in the G’MIC addon repository (as required by the G’MIC license), and everyone can use/change them, but collaboration is hard because the build environment is difficult to set up and it is not really easy to understand what is going on with this complicated process. I can only do this in my limited spare time as well.
For film presets to work, please download this file
and place it in