You’re propose your app as a tool for work in vector. This is not true.
You can add a lot of elements easily, work with color, blur etc.
But once you need to scale the vector object you’ve created YOU SHOULD MANNUALLY GO TO EACH OBJECT AND SET “SCALE WITH OBJECT”
Could you please set as priority ticket for your developers add a SCALE FUNCTION when you can just click on the object, click in Edit Menu “scale”, set ratio or percentage and you will get scaled option of your image.
In addition your export feature need so much power from my Macbook that comparing it to the Illustrator. I’d better avoid all of those coll things you’re proposing just to get scalable and adopted vector file.