The idea is to have fully fleshed out major updates. If the game is updated in small weekly patches, things will fall through the cracks, examples including exploits, or crashes that can really cause a mess. Papaya specifically sourced the beginning of ITOS, and how the fast update structure didn’t work like they wanted it to.
I should have pursued further in asking about how KTOS was handling things because their updates are quicker, my guess could be Nexon helping with any QA and additional manpower shortages.