I just got my Odroid-N2 and loaded CoreELEC-Amlogic-ng.arm-9.0-devel-1555226781-Odroid_N2 and its its working nicely!
Ive did the following to turn off the heartbeat:
created /storage/.config/autostart.sh with the following:
#/
#/ Turn off blue heartbeat LED
#/
echo sd > /sys/class/leds/blue:heartbeat/trigger
Then chmod +x autostart.sh
My feature request is to add that functionality to the CE system setting section if possible.
BTW its identical to what I used for C2 so would benefit both C2 & N2!
Thanks.