Another data point: lost all my pre-integration PQMs on 3/5, though they were there on 3/4, and I also was downgraded to Silver status from Gold, though I was Gold on 3/4. My pre-integration UA flights posted on 3/5, but I only got 25% award bonus (Silver), instead of 100% bonus (PMUA Premier Exec). Also, they posted with the reduced mileage (1839 for SFO-ORD).
Concerned because I'm flying Fri 3/9. I'm assuming upgrades are a lost cause, but I wonder if I'm going to have any problems with my E+ exit row seat assignments now that I'm suddenly Silver? Sigh...