Thanks for your replies. @Aeternuxolus , yes, I guess that's the only workaround right now. If I get to it I might look into this further, maybe there's a way to write a tool script that can be run, but I haven't done this yet in Godot other than using tool
to draw some stuff in editor mode, and I don't know if a script could figure out the default values. Anyway, this isn't crucial obviously, it could just be convenient.