Forgive me if this is a silly question, but what are the chances of these changes ever making it into main?
I'd like to try your build, I just don't want to get stuck on an outdated firmware version eventually.
It's easy to answer: 0%
There is a tray for LEDs support upstream. If it's merge I'm sure openwrt developers will backported and will be different from the current development.
But fan support is another history and It would be a surprise to see some development that includes it.
Good news, I'm on my 6th day uptime without disconnections ... 6 days because of AC disruptions in my area, the router reboot alone all the time and still working really fine.
Just nlbwmon that won't work, but I give up, I'll take a look tomorrow to see if the 1st of the month change anything 
So to conclude : sysupgrade from scratch without restoring my conf did the trick !
Thank you for the follow-up and your help
Hello everyone,
I'm currently running the snapshot from @asvio 's GitHub repository on my NBG7815, and it works quite well. I've noticed that the largest eMMC partition (/dev/mmcblk0p11) remains unused by default.
Since I wanted to install Docker, I quickly ran out of space on the default /overlay partition. To address this, I formatted /dev/mmcblk0p11 as ext4, installed the fstab and block-mount packages, set up /dev/mmcblk0p11 to mount on /overlay in fstab, and then copied all the contents from the old /overlay to the new partition.
This allowed me to install all the Docker-related packages without issues.
Would it be possible to make use of /dev/mmcblk0p11 as the default /overlay partition in the official NBG7815 images?
Greetings
Frank