How often do you actually use AirDrop or play games with a nearby device or do AirPlay directly to another device (where you’re not connected to the same WiFi)? I’ve used AirDrop once. It was cool, I enjoyed it, but not worth the WiFi issues it’s causing.
I’ve created a disable feature and conveniently located it in the AirDrop menu located in the Control Center. If you’re jailbroken, you can pick this up in Cydia for free. It’s called “WiFried”.
WiFried will allow you to enable/disable your D2DWiFi/AWDL and can be conveniently turned off/on under the AirDrop settings in Control Center.
A fix for iOS WiFi
https://github.com/mariociabarra/wifried