I'm just glad you get a 50% discount if you already own one version.
Having to pay full price for two games that use so many of the same assets would be pretty lame, but buying two versions is around the price of a home console game.
80$ is a hefty price for all three routes, but at the same time, that is a ton of content. And, honestly, I don't think you need all three routes unless you're a hardcore FE fan with a ton of money to burn. As mentioned before, just Birthright/Conquest + Revelations should be enough. Me? I'm getting all three versions, but only because I'm sharing it with my sisters. I want Conquest for sure, and my sisters would both prefer Birthright.
But how much was the season pass for DLC in Japan? Roughly 16 US dollars? Ugh. I hope the Treehouse does what they did with Xenoblade X and just give the first wave DLC for free...though I won't get my hopes too high.
There's some controversy about on-disc DLC - Anna was already on the catridge before her DLC came out, with everything including Corrin support conversations and an amie model. The Ballistician and Witch classes are also on the cartridge, though you can get one of each class's class change items for free, so that's more forgivable.
....They really ought to include that Anna DLC for free in the localized version. I won't be outraged or anything if they don't, but it'll still be kind of lame if you have to pay extra for her.