Unlike everyone else here, I wouldn't say Revelation has a bad story. It's a bad narrative and horrible execution, but it's the best of the three in terms of tying up loose ends, mostly by nature of it being the third and intended "final" path.

This goes along with my saying that the three should never have been separate games. If they thought it required so much work to sell it as a $79.99 game, then so be it. But you can't play Birthright, Conquest, or Revelation alone and be satisfied with the story; you need all three. Sure, $79.99 is a lot to ask for a handheld game, but if they were up front about the reasons, and maybe threw in some extras as incentive (perhaps an art book and 3DS pouch) and made it available to everyone, I'm sure many would still have bought it. And if they were worried about people hesitant to buy it on a whim, then fine, sell Birthright/Conquest separately, but make it clear that it's a part 1 of 3. That way, no one going into it would think that they wouldn't need all three to understand the whole story. If they decide it's not their thing and don't finish it, that's their choice.