I want to upgrade, if nothing else to check the battery health of my series 3, but I use force touch all the time. I'm very hesitant to lose it. Sad to see it go on the phones, feels essential on the watch. AFAIK, you can't downgrade the watch so I can't try it out and go back if the loss of that feature bothers me more than the few features the series 3 gains in os 7.