So I just did Praetorium for the first time, and it was a pretty terrible experience because I wanted to view the cutscenes (since it was my first time) but since everyone else had already done it, they just kept pulling, which meant that I was constantly left behind and frequently locked out of boss fights, even if I exited the cutscene I was viewing and made a dash for the boss.

Suggestions for how to make this less terrible:

A)Don't let people pull a boss if someone's in a cutscene. Obviously the worst solution because someone can grief by staying in a cutscene forever, but I figured I'd list it for completeness' sake.
B)Don't seal boss rooms, or make the seal one-way so you can enter but not leave, in cutscene-heavy instances such as Praetorium.
C)Have pre-boss cutscenes teleport you into the boss' room upon completion. You already do this with some bosses in there, you just have to do it with the rest of them.