Don't get your hopes up. The play test from a couple of weeks ago was underwhelming. It seems nothing has changed and that the delay was only for people to forget the initial backlash.
Every character basically plays the exact same except for their traversal abilities.
I recommend Rufus for a hassle-free W11 install. Download the official iso from the Microsoft website and use Rufus to put it on a USB. Rufus has options to bypass the W11 hardware requirements and to bypass the need for Internet while installing W11. This will also disable the need to login to a Microsoft account.
There's workarounds by going into CMD during the Windows install but Rufus makes it a lot easier.
You can still download and play it. It doesn't get removed from your library.
About the matchmaking, I don't know, sorry.