Sorry about the thread necromancy, but I was thinking about this issue recently and found this topic through google, and it doesn't seem too old.
I'd totally be on board with this even though I'm someone who is in a couple of Guilds and is a competent healer(or at least people tell me I am).
"Story"(which is basically a kind of gameplay in choice/dialogue-driven RPGs) and other universe-related stuff is the main reason I'm playing this game, and I'm very particular/weird about it. I prefer to do everything in order.
It's mostly not a problem on my main, but Sage healing is the only thing I'm good at so far and I have 7+ other characters I'd like to see the story through with. Even if it'd be pretty similar for all of them. I'm sure the guilds I'm in would be fine with carrying me, but that always makes me feel horrible. Like I'm wasting 7-15 other people's time. It'd be great if I could get all of my other characters through the story without worrying about getting them the best gear or getting good at each role.
I also have several friends I play with who either probably aren't skilled enough to be good at these kinds of games, or have horrible computers that would make them a burden on raids. So far none of them have hit the endgame, because they're kind of alt-happy and don't have a lot of time to play, but I'd hate to tell them they can't continue the story because of how they like to play the game.
edit: and "Youtube it" is a pretty bad solution. Even if the characters in the scenes(I'm also talking about the non-repeatable story wrapper missions here) looked exactly yours and is said all the things you would have it still wouldn't be right for people like me.
edit: Oh, and I wouldn't want them to take away anything from current operations or drastically change how they develop them. Just(I say as a non-developer)lower all the numbers and add something that allows single people/small groups to do the puzzles. It might end up being kind of awkward, but so is soloing those lower level flashpoints.