Update: I've been having this issue since the Yosemite upgrade, never under Maverick, the system of installation @ purchase in June 2014. Please I hope Apple is monitoring the forums for this and the WiFi issues under Yosemite. I seem to notice I have it more after prolonged Magic mouse use, my tool of preference with my 13' MBA. Lastly, recovery after closing the cover without shutdown, an option I simply think great with a MB, and that never gave me issues (never) under Maverick, works once out of three times under Yosemite. Has anyone else been having these three repetitive issues? And has anyone talked or received feedback from Apple on them? I'm hoping with the new upcoming system I can enjoy my fairly new MBA as I had prior to Yosemite. I'm a newbie Apple /Mac fan, and this has soured my wanting to use a Mac or any Apple product (similar downgrade in performance in my iPad 2 with iOS upgrades).
Does anyone know, but has Apple reformed how they develop or there PLC (product lifecycle process)? Speed, Agile, hiring talent/experienced developers, etc., anything that may be affecting what obviously is less quality in their OS's and products? I'd be looking at this closely now from an overall macro to micro perspective if I was top Apple management. They might want to do like Domino's and really hear and respond quickly (ok, Domino's did poorly on the respond quickly part) to these major quality issues.
Any way, thanks for the temp fix of a reset, which is a pain to remember as a new MBA owner, especially if you can't access the net @ the time when the trackpad stops working.