I have not think about it. I was mainly doing this to solve a usability issue im having which i have discuss on previous thread.
if im going to release it as plugin / i might need to allow other to add/remove other property they can toggle such as rotation, the 4 here are chosen based solely on what i use.
Its also feels very hacky. 
the whole idea is to programmatically walk and activate the property on brush editor without opening it because currently there is no way to directly call it.
Everytime something is activated the traverse function is called to locate where it is in the brush editor [idk how taxing that is].
but if someone want it at its current state - i’ll provide it to them [once im sure it has no bug].
been using it to 2 sketch session and have greatly enjoyed ^-^ its presense.