I used
DCL transportation in Feb of 2024. DCL assigns you a boarding group (normally out of PC 3-4 is Hyatt, 5-7 is WDW resorts). This started when Pearl was added. Concierge gets Boarding group 1, Pearl 2, DCL transportation from Hyatt 3, sometimes 4 and then DCL transportation with deluxe resorts getting the lowest and then moderates and then values. I just looked back at my old PAT form and I was actually given group 7, not 5 when coming from Pop...
When you take the bus back to a resort (not airport) you are asked to leave the ship by 8 AM. So that is an issue with second dining breakfast. If taking a bus to the airport they fill them as guests arrive so there is not the time restraint but they cannot leave for the resort until all guests are onboard the bus as they make one stop at each resort
I sailed 3 times out of PC on DCL in 2024 (with 2 more coming before the end of the year). I have done 12 sailings on DCL since 2020.