Pending completion of the Black Desert Online maintenance today, Musa / Maehwa players should notice improvement in both attack and defense thanks to an increase in basic stats for both classes, both AP / DP for Melee, Ranged and Magic. This has been an ongoing issue for the class since its introduction earlier this spring.
In addition to the normal bug fixes, players can also look forward to improvements in the interface, monster changes, mechanic and item changes.
You can check out the full list on the Black Desert Online forum.