lags and freezes
After flashing minimum gapps over standard gapps, it seems that all strange behaviors are now gone. No more delays when turning the nexus on (was up to 5s sometimes! ) no more system freezes either. I am running cm11 4.4.4, but this may apply to other roms as well. You can find it at http://www.androidfilehost.com/?fid=23501681358554723
I wiped cache and dalvik after flashing.
Tablet: Nexus 10 with KTManta_F2FS data and cache and CM11
Phone: Jiayu G4 dual-sim on android 4.21
Phone: Xperia P with Enigma 6.5/Nemesis 6.3