I have been downloading the daily builds a few times each day for 3 days and I've seen no binary size difference and the app still blocks configuration changes due to "vehicle is flying" message for the Rover airframe.
I tried building QGC from the docker image but that didn't go so well. Maybe after the holiday I can sit down and work through all the issues to build QGC and get the firmware working so I can then start working on ROS.
BTW, I followed the links from the PX4 web site to the downloads page and from there to the daily builds page. The text in the titlebar seem to indicate there are daily compiles but the switch to enable config changes on Rover airframe does not seem to be working.