I'll try adding faster animations for stuff you mentioned, most likely as a toggle in options or as an optional download, dunno about making a scale sounds like a pain. No promises on when, last time i made such claim i was a week late...
Personally i use notepad++ with Comapre and JSON Viewer plugins, also custom syntax highlighting and custom function list. VSC is probably better but i am way to used to npp. Not sure where to guide you regarding coding itself since i don't know you skill level. Personally all i use is docs.godotengine.org but that may be a bit confusing.
When it comes to helping with modding just dm me on dc, its just way more convinient than chatting here.
Disabling loli module isn't currently possible, what you can do is in src/core/variables.gd set child_age_weight to 0.
They won't generate as random slaves if you do that.
Babies will still spawn as children, and you can still use youthning potion to turn a teen into a child, also they will still be present in character creation.