Because you already ordered the iPhone 7, I say try it out. If it works well for you, keep it, and if you don't like it, you can return the device to Apple within a few days.
Personally I did not really like the 6/6s designs. The 7 is ok but I'm not ready to give up the headphone jack until wireless headsets are a bit more mature. So I went with an SE. Should keep me going for awhile since it has the same CPU as the 6s.