It's a ridiculous step up from extremes or other stuff. I feel like it's a lot worse than previous 24-man "hard" content like DRS or BA? It just cascades failure SO fast to a wipe that it feels like you don't even get to practice a mechanic unless people are perfectly resolving everything up to it.
The fact that you basically have to have everyone alive at the end of p1 to even get to play p2 at all is a massive wall to learning the phase (and p1 can just delete everyone anyways if too many people - or any tanks at all - are dead for Rapid-Sequence Particle Beam)