Here's the deal, if they are still concerned about server congestion AND Yoshi P is still tweaking story content only 2 weeks prior to the original release date, another two weeks isn't going to do anything significant.
If you ask me, it seems they are behind schedule, the expansion is nowhere near ready and I honestly have ZERO trust they won't delay it again in another two weeks. While I am irritated I have now taken a two-week vacation for nothing and can't change it, I am nervous to even ask for December 3rd off because I think the likelihood of another delay is so high.
It seems to me, they should have stepped back, relieved the crunch they are going through and delayed to February 2022 with the launch of the Oceania data center. Because I still believe this EW launch is going to be an absolute disaster with the current state of server congestion.
Just my thoughts because something seriously seems off with Endwalker and it seems some major scrambling is happening behind the scenes to hit this Holiday date, which I think releasing the expansion during the holidays as well is a horrible timing move too. You can see how tired the dev team is and Yoshi P looks like he just wants to disappear in a hole. Hopefully they can meet December 3 and 7th with no issues but I am not holding my breath.