WiFried (AWDL Disable) beta from ModMy is out and I tried it. The author says he's pinned down the iOS 8 WiFi problem "to the use of Apples Wireless Direct Link (AWDL) that is used for AirDrop, AirPlay, and Gaming connections." Furthermore he states: "Ill go out on a limb and say the WiFi issues are because of Apples choice of using Bonjour over AWDL and that, given the constraints of the WiFi hardware, this will be difficult to get right. But perhaps Im crazy, and this is just a bug that can be fixed by Apple." In any case, after installing it on my 5s on iOS 8.1, it seems that my WiFi performance has drastically improved. I'd be interested in others experience with this. As for me, I'm relieved!