Minor annoyance that I've not seen reported elsewhere: when iPhone's personal hotspot is active (and one or more devices are connected), the phone displays a blue band at the top of the screen (where the status bar usually is). When this is visible, the Swype keyboard seems to be offset downwards by the band's height. This then partially clips the bottom row of keys. The keyboard is still usable, just somewhat inconvenienced.
Currently using iPhone 6, iOS 9.