as noted in my other comment, i'd be ok with a full screen version of this phone if they put the home button on the side and keep the fingerprint scanner (in button or in screen) and leave off the front facing camera (pinhole camera is acceptable too, but not a notch). i'd prefer to keep the headphone jack, but that's probably asking too much of apple.
Yeah the headphone jack being removed pissed me off too. However the lighting to 3.5mm adaptor isn't as bad as I thought it would be. Sure it was an extra £9 I wish I didn't have to spend, but was also a figure that I didn't lose any sleep over when ordering it.
The adaptor just lives on my headphones as I use a differnt pair at my desk. The only reservation about it now is "Will it fray like all other apple cables do with time?"
EDIT: Also had a 6s. Had 2 battery changes and the phone was due for a 3rd before recently just swapping the phone. First was done by Apple for free (excluding the cost of travelling to the Apple store and turning it into a shopping day :-P), the other I did myself at home with a 3rd party battery.
the back would be ok, but one of the reasons i like the side button with fingerprint sensor (or in-screen) is that it can be face up on a surface and you can still actuate the sensor. it's not that big a difference, but it is slightly better UX.
i also like the fingerprint version over faceID because it's not 2 steps to open the phone most of the time, but still gives you the option to see the preview screen when desired (pressing the home button with the fingernail/fingertip).