Here are a few rewritten titles, playing with different aspects and tones:

Focusing on New Content:

• Seoul MMORPG Update: New Seonin Class, PVP Revamp, and More!
• Major Update for Seoul MMORPG: Introducing the Seonin Class and PVP Overhaul
• Seoul MMORPG: Experience the New Seonin Class and Revamped PVP System!

Focusing on Excitement/Impact:

• Seoul MMORPG Revolution: Seonin Class, PVP Reimagined, and More Await!
• Dive into the New Seoul: Seonin Class, PVP Overhaul, and Massive Content Update
• The Future of Seoul is Here: Introducing the Seonin Class & Re-inventing PVP!

More Concise/Direct:

• Seoul MMORPG: Seonin Class & PVP Update Now Live!
• Seoul MMORPG – New Seonin Class & PVP Changes
• Seonin Class & PVP Revamp Coming to Seoul MMORPG

Focusing on player experience/action:

• Master the Seonin Class: New PVP Awaits in the Updated Seoul MMORPG
• Fight Your Way to the Top: Seoul MMORPG’s New Seonin Class and PVP
• Unleash Your Power: Experience the Seoul MMORPG with the Seonin Class & PVP

When choosing, consider:

• Your target audience: Who are you trying to attract?
• The main selling point: What’s the most exciting feature?
• The overall tone of your marketing: Do you want it to be exciting, informative, or something else?