What a wall of bullshit. This is all about giving Bland World more space.
I dunno what they're talking about with "recent changes to the Korean version." The only major changes to the game were when they launched Season 2, which is what we are getting at launch, just like Japan did. All updates to the game other than that are content (continents and classes). And the more of that you frontload, the less you get to piece out every few months. While I'd love for them to add Scouter or Reaper, waiting another 4+ months is hardly worth it, for me at least.
I wish NcSoft would "Surprise Motherfucker!" and beat them to the punch with a sneaky TL: Origins launch. Teach them not to be so fucking greedy.
Regardless, I think Amazon has really missed the boat by delaying LA. TL will be a direct competitor, and could easily turn out to be a better game. No firm release date yet, but it's supposed to be launching somewhat soon, and it's a global launch, too, and a lot can happen in the next 4-5 months.