The NPC transmission cut-in is in a fixed position it seems. So that means less needing to find where the text box when you move the camera/etc:
RUNNING IN THE NINETIES (You can dash/2x Jump/Glide in the base):
While I didn't get a screenshot of it. You can see the giant video screen in the amphitheater from the opposite side of the base.
Moon Atomizers are also much faster to use.
And through this stream you'll also note that players who leave the base instantly disappear from view unless you also go out into that field area (regardless of party or not.) It looked like the staff were trying to make sure their cameras didn't show that, but I noticed it out of the corner of one of their cameras.
Player models will show the blocky loading animation like NPCs do when they're coming in and out of areas in this case.
Enemies with a high enough level difference will have reduced damage dealt to them. The below image is showing a small enemy without a shield core being attacked, and showing the level difference message: