One of my favorite options to setup in drawing apps is setting the double-tap on my Apple Pencil to select the eraser. I’m sure other customizations could come in handy as well. If possible, I think this would be a great feature!
THIS! I’ve gotten so used to double tapping my pencil to switch to the eraser that I do it on real life pencils. But yeah to others’ points, give options. I’d recommend them looking at Procreate’s options and mirroring those.