Hartsman spoke with fansite ArcheAge Source, and he said that "XL can only work on so many things at a time while they strive to constantly improve their live Korean service." This means that ArcheAge's partnered launches outside of Korea are worked on "serially," and the western release is a couple of spots down in the pecking order. The one piece of good news there is that the western release will benefit from all of the stuff XL has learned from launching the game in other markets.
Hartsman also mentions substantial progression and economy improvements that will find their way into the sandpark game before it reaches western shores. "The economic game of ArcheAge is a big part of what attracted a lot of us to this game," he said. "XL will be implementing improved balance between crafting, farming, and trade, [with] the goal being to promote a more vibrant economic game that produces more valuable and more frequently used items than what the original version launched with."
[Thanks to all our tipsters!]