This is mostly due to it having 30 minutes of cutscenes and the only way to attract players to repeat was through roulette rewards and an automatic cutscene skip feature. Seriously, it used to take several days at most to just to get enough people to join a clear party for it, so a lot of people ended up being stuck and locked out of content. BTW, on my first time clearing Prae: I missed like half or more of the boss fights, so that is what you will have to put up with if you want to clear the praetorium, shout or que.

P.S. Thank you so much to everyone who helped me with my first clear back then, and the developers for helping so many players finally clear the MSQ.