I would like very much if SE would make it where you had an option from the goblin footprint or something to enter a BCNM you did for a story over again any time you wanted to... for fun.
EDIT: I just wanted to add more detail as to why this would be cool. For anyone who enjoyed the storyline for any of the missions, rechecking all the goblin footprints and cutscene-replay bards just isn't the same as when you go through the whole mission line for the first time; you watch a cutscene that is supposed to get you all amped up for a fight, and then... you walk to the next footprint assuming that's where a BCNM was supposed to go... it takes all the fun out of it. Making it possible to redo the fights would make it possible to fully enjoy the story of a mission-line all over again without having to search high and low for someone who doesn't have the missions done already or be at the mercy of their playtimes. Most expansion mission BCNMs are soloable or duoable at least now. Adding this would be like making a single-player version of FFXI where you could relive the story over and over.