Meanwhile the app switcher STILL runs like its running Crysis on 9.1 xDStutter has never really bothered me, I'm not someone who really thinks it gets in the way of the many useful features that iPhones offer.
however I will say 9.2 actually seems to have introduced more stutter on my iPhone 6 when opening and closing apps and unlocking. like really bad stutter, 2-3 fps, not just a few dropped frames. will see if it settles down. it's only about 5% of the time