Unfortunately, Apple has adopted the Android model for iOS. They are going to plow through their unpolished, unrefined and glitchy programming with horsepower. The only hope is 6s.
I am particularly bitter about this because it was the reason I left Android.
I feel the exact same way. You are spot on with everything. I left android because of this as well. Ever since iOS 7, I've seen the quality of the iPhone's software programming decline. I'd rather they get it right and take longer to release it to the public. Stability, smooth transitions, no lag, no stuttering is what the iPhone use to be. Now its closely resembling the glitch fest that is Android.