So hear is the thing, lol. I'm not sure if this is how you feel, but this is what I always here from people. You paid hundreds of dollars for a new iPhone, you get it, and it doesn't feel much different than the last one. This is fairly true. Its the same apps, mostly running the same way. And since its an "s" release it looks the same too.
The thing that made me say I Love this phone and would not be returning it was not the 3d touch, live photos or better camera. Its the speed. This new iPhone is so fast. it makes everything I do on my iPhone smoother, quicker and more enjoyable. Then I add those other things to it and its very cool. If your not a person who uses their phone everyday all day, these smaller upgrades may not be ideal. But for someone that lives remotely on their phone, doing everything on it. its a great upgrade.