For me as an average user it does not matter even a dime if it is physical or touch ! Infact now they have Spoiled the looks of the rMBP ! How's does having physical ESC help can you explain me ??
With the touch bar ESC, you can sometimes just hit it, and sometimes you have to tap it once to wake up the touch bar, then hit it again to get the effect of the key. And you don't know which case you're dealing with unless you actually look down at the keyboard.