Nexon America's answer about Masteria

Not just me--those quests were the product of literally hours of conversations and research, from the ones in NLC to the Haunted House to Crimsonwood, etc. It takes a lot of time to actually do that.
And honestly? I think that for the most part, the content is pretty good. The key is improving with each round, which is something I know they're still committed to, even if it seems otherwise. There's a lot that may seem simple to do, but really isn't.

I never thought that making such long and complex quests was easy. In fact, I always knew there must've been a lot of effort behind them.

Not gonna say that the current staff isn't competent enough to do it, but really, the quests (if there will ever be another expansion) won't be the same anymore without you, I'm pretty sure of that.