As much as I wanted the antenna bands reduced, and a non-protruding camera lens, it's clear to me that whatever Apple designs for the number iterations -like the iPhone 4,5 and 6, becomes the standard design for the S iterations. Maybe this is for consistency as the iPhone 6 and 6s are the '6' era phones, so that's their trademark 'look', or maybe they just horde major design differences for the next numerical iPhone so it's seen as a bigger 'jump' and upgrade to the public, who knows?
So now I'm expecting a protruding camera again. And in fairness to Apple, if people still bought iPhones in their millions, why bother spending the extra time and effort fixing minor design flaws and just focus their design efforts on the '7' era of iPhones? It's actually very logical and makes a lot sense for them to do -as much as I may dislike the camera bump!