Soo, today I have created a simple Sysupgrade-like server that will allow rapid access to robimarko's firmwares for ipq807x devices by proxying requests to github and creating a sysupgrade standard response.
In this way you can upgrade your openwrt on:
...directly from the web interface.
You can find the tool here, and you can self-host it or use the version i am hosting:
Thanks again @robimarko for the builds