Yosemite has been an up and down roller coaster for me connectivity wise ever since upgrading. Random disconnects, not popultaing SSIDs. PEAP issues, disconnecting and reconnecting. In writing this post it disconnected once already. I caught a trace of it disconnecting. It revealed the NIC sending a deauth in what appeared to be for no good reason.
Wanted to reach out and see what others were seeing. I read this article yesterday and may give it a try.
http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/
Im also seeing issues with iOS 8 on my iPhone and iPad. Neigbor list take forever to populate. Anyone else seeing these issues ?