I am vehemently against buying levels, especially if it is to level 50 or more since people can boost their alts and easily buy more housing when they come out, if they want extra houses, they should work for it in game. (cough cough or buying max level characters for PvP boosting/rigging)
I am, however, for skipping the MSQ, especially the 2.x-3.0 MSQ. If someone wants to level by fate grinding, or dungeon grinding, or leves, or whatever, they should be able to have that option rather than do story. If one is going to argue "this is a ff game, it is story", well, it is also an MMO, and some people are playing it not necessarily for the story. Why not attract both audiences, those who want the story and those who do not? The story would still be there, just not mandatory to do anything. It would be great for alts too, since mashing that escape key is something that is not really my definition of 'fun'.
I bailed on WoW when they introduced buy-a-90, I would seriously consider bailing here too if they released it.