It hasn't even left. It is still there. In the MS/Xbox store and as well in-game via the AC shop.
Converse with fellow players
I believe I may saw them with Sirona - Treasure Shop Trustee few times. I think she was offering them for meseta. Keep an eye out on the shop.
It's because SEGA wants your money. The whole "it's to stop the bots" explanation that global people throw at everything is nothing but headcanon. I mean look at JP, they also lost it but their community never had a bot problem. So, please stop spreading that cope nonsense to justify SEGA taking something away from the F2P community when it's simply an action of greed.
You can't properly compare the JP ver with the Global ver. They are quite different. The JP ver is isolated in Japan and not released outside of the country. So anyone sending bots into the jp ver can be tracked and caught or blocked since no other country may have easy access to it.
In global ver. all countries have access to it. The people that are running the bots are in countries that your respected country or any other country can't touch not even Sega themselves. So it is a lot easier to run bots in global ver than it is in the jp ver.
Photon Dash/Glide - gather the photon around you and use it to push you forward.
Basically, the photon you would normally regen is being used toward the dash instead.
There are 2 classes that have skills that help regain PP. Gunner has 2 skills to recover PP faster while attacking enemies and/or bosses. Force also has 2 skills that help with PP recovery.
Sega has posted a way to update the game.
Install the Xbox app via the Microsoft Store. Launch the Xbox app, go to My Collection > Manage Installs, and click either Update or Update All. Launch the Microsoft Store, enter “PSO2” in the search bar, and select “Phantasy Star Online 2 New Genesis”. Confirm that the game was updated and launch the game.