While most aspects of the iphone 7 are great improvements on its predecessor, especially the camera, the removal of a physical home button doesn't seem to add anything, and I really liked the real home button on previous models. additionally the lack of a headphone jack is, while not necessarily a deal-breaker, a great inconvenience as I now have to use a dongle to charge my phone while I listen to music or podcasts on my commute and on trips. Again, I'd like to emphasize it's an all-around solid phone, but the above are my grievances.
