I just did the same thing, kept missing phone calls. Often times the phone wouldn't even ring I would then be greeted with a voicemail alert several hours later. Was fine and dandy until my boss tried to reach me. Bad part is I still find myself trying to swipe iMessages to respond from the lock screen, boy do I miss that feature. Perhaps beta 3 will be better or I may just wait until GM for stability. I also downgraded my iPad Air as well as my Macbook Pro from Yosemite ... (Battery life was real bad on yosemite, was afraid I may add additional strain to the battery)
Same here. I need the stability of 7.1.1, but miss the features if iOS 8...