I really don't see it as a mess.
Yes the first run always sucks if you don't have friends to warn you that everyone is going to leave you behind if you insist on watching cutscenes... but after that just follow, skip cutscenes ( should have them set to automatically skip previously seen ones by level 50 IMO )
You should not have a problem finding people, that's more of a user issue than the praetorium or the game. Use the shortcuts after a notice pops up on screen that a boss was killed, just like in a dungeon, and use your mini map to see where your party is.
I'm sorry you got left behind OP but praetorium is not that bad.
