Once you start running Hard Mode instances you would get very sick of the dialogue every time you re-run them. Remember Arthas' dialogue you had to wait to finish in Heroic CoS?
That said every flashpoint is awesome.
And just like Heroic CoS you can skip the dialog entirely by having everyone hammer space if it bothers you that much. I've had groups of black talon say that they are skipping all chatting and that you'll be kicked if you don't. Essels becomes a short run that still gets you a ton of social points so you can get the social gear as opposed to the next three that nets you 10-15 a run for the same length of time.