One of the annoying quirks with Sketch is the fact that when I'm using the Apple Pencil, oftentimes I get a lot of accidental strokes from the palm of my hand... In Procreate there is the option to make it so that the finger only controls gestures and the interface. It would help me a bunch if you could do something similar, because as of now, I have to erase a lot of unwanted lines...
I don't know if it is something you hear a lot, but if it is, at least you know there is a big demand for it!
Sketch has the best brushes I've seen in any iOS app, so I would love to be able to use it as my go-to-app, instead of Procreate (since Procreate's brushes don't feel as natural as your app does!)
Also, I hope that when you make brush customization into a paid feature, you make it a one time purchase. I will buy it if it isn't subscription, because I don't like having to pay for something every month (or any other set timeframe) for something I'm not using every day the time...
Actually, this is a request I'm seeing a lot lately. And when I see it frequently, the product team sees it frequently. I can tell you this much... How to incorporate a toggle to ignore fingers when using a stylus is being seriously discussed by the drawing teams. I can't give you any more information than that, but it's pretty safe to say that it will surely make it to the app(s).
About brush customization and other paid features: I honestly don't know what the plans are for those features that we're calling out as possible paid features but I'll definitely share your concerns/comments with the team.
Hope that helps a bit.Thanks for posting.