Agree. As a small developer, apples 30% tax never bothered me - seemed excessive but worth it. The arbitrary and weird approval rules is what turned me off their platform.
Although I could see how they are trying to appease antitrust regulators with this move - although they should have gone with 0 - 2% range for that. 15% is a substantial markup to price consumers would pay for using apples monopolized mobile software distribution store.