hognac, I feel your pain. Although I am not from the factory I have had experience with the satellite signal to the bedroom. I did this on both my 2008 and 2011 Bighorns.
I think, and key here is think, that there is a splitter somewhere in line. Satellite signals do not work and play well with splitters.
What I did is to find the coax that runs to the bedroom. It has been a white one on both my rigs. In the basement behind the bulkhead is where I cut it off. I then put on a new connector and added a barrel connector. I then attached another piece of coax and ran it to one of the UDC connectors. Everything works now as it should.
I know I have some pics of what I did in one of my PC's, If you need them I will look for them.
Sounds easy, and it is.
As far as the installation of your AC I doubt that anything was disturbed. Everything is in place in the ceiling so the AC is more or less plug and play.
Peace
Dave