I never skipped the cutscenes until I ran Praetorium, during which, as tank, I couldn't get a single group to stay together unless I skipped all the scenes. The ending was basically ruined for me, the bosses just randomly seemed to be in new environments after the skip and I felt like it was all pointless. It's my own fault for giving in to it, but as far as I'm concerned people can watch whatever scenes they want in any dungeon. Advice to all new Praetorium runners, find a premade with your friends so it's not ruined, it's worth the wait.