I am currently running what I believe is the latest firmware OPENELEC 7, KODI 16RC1 (its a brand new unit).
The issue is starting at boot up, once I boot the unit, before I run anything it shoots up straight to 100%.
Strangely enough, I have noticed that after about 45min to an hour, the CPU utilization is starting to stabilize and the unit starting to behave normally (CPU temp goes to 74c). which then leaving me with the option of leaving the unit constantly on (getting very hot) or starting it as soon as I get home in the evening and wait for it to stabilize
I think I will wait for the newer Kodi 16 (not RC) version to come out and then I will flash the unit, maybe this will help.
I use the unit to mainly to stream movies and music from my local NAS and a bit of on-line streaming, nothing to heavy...