YES, without hesitation. My Note 4's already quite a bit thicker just because of the OtterBox Commuter case I put on it, and it actually makes it a great deal easier to hold. It doesn't affect it fitting in my pockets, either.
That and I hate how manufacturers claim how thin their phones are, only to have the camera module poking out noticeably. That's just cheating now. It'd be a far sleeker design without the hump, just a nice, flat back.
This is also one of the reasons I advocate removable batteries in phones: the user gets the choice to install an extended battery with replacement back if they so choose if the stock battery capacity isn't good enough, without the issues that arise from having a separate internal battery and external battery in a battery case.