Extremely brief update... will go into more depth later.
After having the phone for a few weeks here are my updated thoughts.
I was in LA for some time and used the S6E+ mainly for navigation and it was pretty great. It managed to last 3-4 hours of google maps navigation everyday which is pretty solid in my book. Other than that, 'cell standby' is still the main killer for the battery everyday. I cannot figure out why considering I almost always have really solid reception. It'll drain 10%+ overnight most of the time.
On VZW coverage versus AT&T, it's a coin toss. Sometimes AT&T is better and sometimes VZ is better. In the canyons in Malibu, I was struggling for reception with VZ however, whereas I still had 4g with AT&T. Heck, I was eating at a place off PCH and I couldn't get a signal with VZ which surprised me considering it's a pretty populated area.
On to the phone. The edge screen is annoying sometimes when typing. Sometimes it'll register a touch from the edge when holding it and it won't let me type or use the screen. Some touch-rejection software would be useful in the future. I do notice a difference in screen resolution when looking at small content, there is so much more detail versus my 6s.
There is no denying touchwiz is so much better than it used to be. I'm hoping even more slimming down will take place when marshmallow comes out for the S6 phones.