flashed the Lollipop nightly 0310 and gapps on my deb today, and found no problems so far, everything is working well

I even did it as a update to the stable KK release, only wiped system and cache
Only thing that was not working was WiFi, had to shorten my wifi key (using WPA2 CCMP, n+g on Fritzbox 7360) from 17 to 12 digits as it was hanging in authenticating and then giving authentication error, no matter if I entered the key by hand or with WPS.
And yes, I checked with a full wipe, the error persisted, and even on the latest CM12 nightly 0315, my deb would not connect to the wifi when secured with the 17 digit key. I guess it is a general error in Lollipop or the kernel.