How can i fix my wifi and bluetooth issues in yosemite?

Hi, after upgrading to Yosemite I've noticed that my bluetooth trackpad (Logitech t651) and wifi connection are having serious conflicts which result in sluggish trackpad response or occasional wifi connection drops.
I would have some occasional sluggishness with my trackpad in Mavericks but it would never lead to dropping of my wifi connection. Here is a little more about my configuration, my wifi connection is 2.4ghz, I have read that upgrading to 5GHZ would solve this problem but this would of course require me to purchase a new router which I would like to avoid. I have noticed that if i turn off my wifi, my trackpad is 100% smooth and responsive so the two issues are definitely connected. Does anyone have solution to fix this problem that doesn't include changing the wifi broadcast channel (which I've already tried), switching to 5GHZ, or utilizing an ethernet connection? Thanks

I think I'm having a similar problem, my wifi disconnects when a bluetooth device is connected to the MBA. 
I have a MacBook Air (13-inch, Mid 2012) with WiFi and Apple Trackpad.  I'm unable to use the trackpad(bluetooth) and wifi at the same time.  If I turn off the trackpad then the wifi works fine and if I shutoff the wifi then the trackpad works fine.  This configuration was working fine prior to upgrading to Yosemite.
I experienced the same problem at home and at the office.
Additional test:
I turned off the bluetooth trackpad and connected my bluetooth headphones to the MBA.  The wifi disconnected as soon as I paired the headphones with the MBA.
I have had no problems with the MBA's keyboard or integrated trackpad. 
Rick

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