I'm adding a quick note to this (old-ish) thread becaaaaaause:
I am profoundly hard of hearing and rely on the vibration differently than it seems like the rest of you do. I have high-frequency hearing loss and cannot hear a normal ringtone (this includes a wake-up alarm) and have relied on the physical vibration which is within my hearing range to alert me to....everything, really.
But I just upgraded from my beat up iPhone5 to the 7. The 7 must have the same Taptic engine as the iPhone 6s that you all are discussing here, because I have missed so many calls/texts (....all of them) because of the reduced vibration. I understand that this is a refinement, and that's good, but I wish there were an option to increase the intensity of the vibration for those who want the louder/more violent vibration. Like I said, as a nearly-deaf individual, that strong vibration was within my hearing range. Now it's gone. I slept through my alarm this morning because the vibration on my bedside table did not wake me up, and I barely made it to work on time. And yes, I know there are accessibility options like vibrating pillow alarms or fitness watches with a silent alarm available to me (if I'm willing to spend). But I would much prefer to have all those features bundled together, like before.
tldr; The strong vibration was important for me as a deaf person, and I wish I had the option to increase the *intensity* of the Taptic alerts as well as the rhythm.