Apparently Private Party were in line for a tag titles run earlier but injuries kept pushing them back.This is just all speculation from me, but Private Party was doing pretty well at the time and getting really good crowd reactions, so I think Tony gave them a quick, "thank you for your service" run. Nick Jackson was supposedly really beat up and needed a few months off, so the Bucks had to drop the titles. Quick pat on the back transition run.
Private Party was a Young Bucks signing when AEW first launched, wouldn't doubt they had a say in who they were going to drop to.
I'm biased because im a fan of his, but they really could have done a bit more with Kassidy on his own. Brother Zay was a dumb fun character that took off, everyone in that final deletion really got pushed aside on a random Rampage and it was one of the more entertaining things they did up to that point. Went on a rant there lol.

