I last flew UA a day before their 3/3 computer integration with CO. I'm currently looking at booking a trip in April where part of the trip is on actual UA metal, and part would be booked as a UA flight but in reality would be a codeshare flown on US metal. Two things:

1. Has anyone had experience post 3/3 with flying UA metal and crediting the miles to your Dividend Miles account? It sounds like Mileage Plus members are still having lots of issues so I didn't know if it is even worse trying to credit flights to a partner airline.

2. Do the upgrades for the legs on US metal still work the same way as they did previously? Meaning, when I book a mixed-metal itinerary, will I still get a UA confirmation number for my UA flights, but also a US confirmation number as well, meaning that upgrades on the US flights will be processed business as usual, as was the case pre-3/3?

Any insight is appreciated!