I have complained only on the A to Y fare downgrade, especially the time we departed with an open seat in F but ambivalent GA wouldn't fix it even though I asked before boarding. I got $200 twice, the third time was the blanket 20 or 25K miles we all got during the ATL storm debacle. I have bought 40 A/F/P segments this year and it highly, highly, annoys me that I have been downgraded 10% of the time and I know on at least 3/4 it was because I either wasn't on UG list or put on as a PM and not A/IROP.
They also always eliminate the MQM bonus so I have to message to get that as well.