I think the Cowboys, no matter how hard they try to get past it, are at a mental block with regards to Garrett's tenure being over, and are suffering burnout.
I think they will lose again on Thursday night despite being the better team, and that will be the sign to Jerry that this is over and has to end immediately.
Despite other options, look for Kellen Moore to be named interim head coach and then made official after the season ends.
I just don't think the Cowboys can mentally function to play up to potential now that the end is in sight for Garrett.
Just my 2 cents worth.