So Nexon Korea finally cannibalized the Masteria assets.

I'd imagine he was referring to GMS, considering Masteria originated there, and he seems butthurt that KMS created Dawnveil using the (gathering dust) Masteria assets.

I don't understand peoples problem with it anyway. Masteria was already dead, let them recycle into something new and incorporate it into the main story.

I was being sarcastic
Well, MSEA still has Crimsonwood Keep (both the old one for getting MoN and the new theme dungeon) so TS can head there if he loves Masteria so much.