Been thinking about it and am not overwhelmed by the benefit of two camera's on the 7+ being worth the extra size. You don't have to walk so close for a somewhat closeup, but that is really not a huge thing - just take a couple of steps. The Bokeh effect will be cool when they finish that, but those are pretty mild things for the addition of another camera and the hugeness of the 7+.
Waiting till a true unlocked (non provider aligned) version of the 7 comes out prior to purchase (October for the 6s) so I still have some time to wrestle with this. I really utilize the camera on my iPhone and was assuming I'd go with the 7+ monster...but reflecting it really doesn't do that much more than the updated 7's camera. The promise of bokeh shots will probably get me in the end though. JMHO....