I disable 4 or 5 Finger Gestures on Settings.app > Multi-tasking and Gestures. But in the third-party apps, 4-5 finger touches are sometimes immediately cancelled. Especially, 4-5 finger swipe gesture.
I filed this issue to FB19226717.
I develop Piano instrument app. 4 or 5 finger touches are required for that kind of apps. Please fix this, Apple.