Someone says: when you are paying attention to some details you did not pay attention to normally, something related to you is happening.
I am not sure why you are so obsessed to this minuscule home button delay but given that Apple is about to abandon home button altogether and embrace that ugly notch design across the board, giving up complaining this delay could make your life a little bit easier. Just saying.
So the fact that an update downgrades a devices functionality even if it going to be discontinued is okay?