In general, it looks like there are still some kinks to work out as well, with complimentary upgrades.
I have two JFK-LAX flights booked for this fall on PS equipment.
1. First flight is booked in Main; existing (complimentary, not GUC/RUC) upgrade request to D1 is still in place. No option to get on the upgrade list for PS yet.
2. Second flight is booked directly into PS. Was not automatically added to the D1 upgrade list for a complimentary upgrade. Online, it shows me the option to get on the list, but when I try to select it, I just get an error message. (Not the biggest deal since as a Plat flying on a Thursday evening, there's no way I'll clear anyway.)