Unfortunately, I don't believe Gravity has the resources to start another project. They need to make this game succeed or improve on their currently existing games (Not an option for most of them.). There was a long discussion once in regards to the values of their stock and the condition their company is in. No, I'm not talking about Warp Portal. Talking about Gravity as a whole. They need to remind themselves about the importance behind the longevity for all of their current titles.
Well, they did start improving RO... after 10 years of bugs and glitches.
Guess that means RO2 won't get better until 2023. Dang.