The silence is due to Cykan.
Cykan is veryyyy protective of LO, not even the Daum CBT had half the game implemented for security reasons, I can't expect Aeria to have any news whatsoever.
Why is Cykan doing this? Cykan has many direct competitors such as RO2 and Project R1.
You may say, RO2 sux and Project R1 has barely any information.
I would agree, but the Gravity, the developers of RO2, are taking it slow however if they took a look at LO's progress, they would start working on RO2. Project R1 is still in dev, and they can counter whatever LO has if they get all the info on it.
Also on top of the situation with Cykan, Aeria has been hard at work with DKO and Scarlet Blade. Luckily, DKO is out, and Scarlet Blade would probably come out soon since it's in alpha. That leaves Lime Odyssey to have full focus, and wouldn't you know the timing is absolutely perfect.
By the time KR LO goes into OBT, Scarlet Blade will atleast have had its Closed Beta.
That means by the time Scarlet Blade goes live, Lime Odyssey will have probably been worked on and started its own test phase in English. Btw, that's also around summer in NA :3