If we are going the route of "classic" devices which retain the home button for a few years and X devices which are FaceID only then it really does make sense for Apple to create a more premium version of the SE as well (bring everything that will fit, so the camera module will be more basic).
I do feel bad for anyone who prefers the form factor for one handed use but gets gimped on specs and delays to refreshes. Heck, create a classic version too that uses the A10. Satisfy both markets properly if we are going to two tiers of devices and then sack off the legacy stuff before the 8.
The split between iOS devices which have 3D Touch and those that don't is ridiculous at the moment. Get it on everything so experiences can be consistent with each other or just sack it off. It absolutely shouldn't be an experience only for certain phones. iPad is crying out for it.