So you're telling me that I shouldn't be playing a game that I greatly enjoy the aesthetics, combat mechanics, and boss encounter designs of (which are, by the way, the reason I play MMOs) because I don't enjoy its storyline? That's a really, really bad business model. Please point me in the direction of this game's exact clone which doesn't include the story.
That's like saying Ferrari shouldn't make cars that aren't red because "Ferrari's are red".
That's awesome that you can enjoy the story of the game. I personally can't. It's too verbose and generic for my tastes. Nobody is trying to stop you from enjoying your fun, why are you trying to stop ours?
I've played every Final Fantasy game in the main series, and multitudes of off-series titles. I won't need more than 2 fingers to count the number of times I've found their stories the slightest bit compelling. I enjoy numbers and mechanics. You enjoy the storyline and characters. That's fine, and it's wonderful that Square is talented enough to make one game that can appeal to people of different tastes.
I play games like DotA, Counter Strike, and Hearthstone. They have no story, but have interesting and depth-filled gameplay and are a good place for social interaction. This is the reason I play Final Fantasy XIV, not because of its story. I've played through the story, and I honestly couldn't even tell you why we're going to Ishgard, because I don't care. There's dragons that need punching, and I'm a dragon-puncher.
The only thing that square would need to do to fix the issue is upon Heavensward launch, simply include a warning box at the entrance to Ishgard for players who haven't finished the 2.55 MSQ solely stating that they will be skipping major plot elements if they proceed. That's all we're asking. It's exactly the same as playing a sequel before playing the previous game. (I played X-2 before X, did that make you cringe?)
I'll ask again, why does this offend you people who enjoy the story? Why can you not accept that other people have different preferences in their entertainment?