Well, after 2-3 months using the iPhone 6s Plus, I've come back to the S7E. Several factors:
It's just so darned gorgeous...can't keep my hands off it. (Still used it on wifi most every evening.)
It's lighter and smaller than the 6S Plus.
I found a solution to the one-handed problem...well actually two.
I disabled the Edge functions, which I really didn't use.
I found one of those finger-ring cases, and fell in love.
I've since bought numerous of those finger rings that can be stuck to the back of most cases. Haven't looked back.
Don't get me wrong...the iPhone is a damned fine device, and I would have no problem using it. It also plays nicely with my MacBook Air and iPads. However (and ironically), the very thing that pushed me away from the S7E (one-handed use because of the edges) pushed me back from the 6S Plus (one-handed use because of the sheer size and weight.)