[conorgdaly]

You can sideload the ota image which retains your settings etc, image linked from here: http://www.androidpolice.com/2014/12/23/flash-all-the-things...

I upgraded from 5.0 to 5.02 using this method and it only made a slight difference to the horrendous performance I was experiencing on my Nexus 7 2012 tablet.

I ended up installing CyanogenMod - tablet back to being speedy and snappy: http://cyanogenmod.org/