Hi Thorada. First of all great work!
I was very happy to get couchpotato running on a 905 (runs great) but now it seems that couchpotato itself is becoming almost impossible to be used for torrents. An alternative was recently started based on Sonarr: GitHub - Radarr/Radarr: A fork of Sonarr to work with movies à la Couchpotato. wich seems to work quite well already.
Do you have any plans in including this? (I haven't really studied the sources yet, but as it is based on Sonarr, it should be possible I think)
Patience you must have, my young padawan: updates are in the pipeline.
Nevertheless, thank you for the suggestion, I will have a look at Radarr, but do not hold your breath.
In the meantime, you could download it to LibreELEC and see how far the build.sh command takes you.
You could also give it a try on a PC, and report whether or not you think it is worth an add-on.