My 7+ has recently been plagued by safari constantly freezing... the home button has allowed me to close it. Gestures anywhere on the screen did not work. I really would be worried about a phone that doesn't have a physical button.... I guess that's just me though.
That’s odd. My iPhone 7 doesn’t have a “physical” button. My iPhone 6S+ didn’t have one either.
The iPhone hasn’t had a “physical” button since the 6. The round spot in the glass doesn’t move and is the Taptic Engine Also controlled by software. Shut your phone off and see if the button still ”clicks,” I can tell you now it won’t. While I’ve had similar problems as you, gestures like the lock screen and control center still work over the frozen app. So I wouldn’t worry about the new interface as those gestures are controlled separately just like the “click” of the home button.