Accidental palm touches have gone from 5-6 out of 10, to 1 out of 10. A significant improvement.
Is it possible to check the "velocity" of the canvas' position/rotation/zoom by comparing the values from one frame to the next and limit it to a natural speed(or perhaps freeze it in place)? I've had the canvas spin a whole 180 degrees and zoom in 1000% in what felt like 1-2 frames.
This would be great for the occasions the canvas "spazzes out", even if they happen less often now.