Come on the A10 is the fastest chip out now - it will matter not just for games but as more intensive apps come on line. Both the 6S and 7 have 3d touch (on the 7 much better apparently) which is a major innovation. OIS on both models of the 7 is a significant improvement and yes an optical zoom and better low light performance are great upgrades. Oh and a 256 GB model for those photo and video horders.
Yeah. None of these are major innovations. They are merely minor improvements.
A10 - It's a bare minimum requirement that a chip should improve between generations. What intensive apps are you referring to? Instagram?
3D touch - As you point out, this was already in the 6S. We're talking about the 7.
Camera - The dual system on the 7 Plus is nice, but, like the OIS, they should have put it in both phones to begin with. Again, for most consumers, this is an incremental upgrade (because most people don't understand camera technology). (Case in point: it's not a true optical zoom.)
Increased storage - Again, this is an incremental improvement, not an innovation.
We already know that the real innovations are being saved for next year's iPhone. Pretending that the 7 is something that it isn't doesn't change that.