There is no point. He just can't admit it.
iPhone 4 - antenna gate, 4s? Redesigned antenna.
iPhone 5 slate scuff gate, 5s? No more slate and the release of space grey.
iPhone 6 bendgate, 6s? Strengthened 7000 aluminium.
It's just so obvious to see.
Apple would never have to change a design half way through an iteration unless something was a MAJOR issue (like a recall). Obviously the cases were not enough to warrant a recall or redesign but that still doesn't mean it wasn't enough of an issue for Apple to take notice. They clearly did take notice by strengthening the frame.