As has been mentioned SE dun bad, they KNOW they dun bad, and they have promised never to dun bad again. So far, they've lived up to it - there are no lengthy cutscenes mid-dungeon for any instance after 2.0. They've also made it clear that they have no intention of going back and trying to "fix" the old dungeons. They are as they are and as they will be. Thankfully, with the level cap now at 70, it's not difficult for very small undersized parties to run these dungeons. New players who are in FCs with high-level friends may be able to convince them to run them at a more relaxed pace, so they have an opportunity to watch the cutscenes.

Note that I have been playing the game since ARR launch, and due to the proliferation of max level players coming over from version 1.0, even when I made it to CM and the Praetorium folks were ALREADY speed running, and watching cutscenes was simply not an option if you wanted to participate in the boss fights (which, back then, were slightly more exciting than they are now). I wound up having to watch the cutscenes in the inn, like nearly every player in the game has. This is a problem that's been a part of the game since it first came out.