Game Balance: The Skill Composition
Discussions about balance changes often focus on skill strength, but I believe the "skill composition" is the root cause.
OP characters often possess the traits of other classes or characters as well. (e.g., Valkyrie, Alter, Axel, Seer, Loba, etc.) Adjusting skill strength alone is unlikely to resolve a stagnant meta. Extreme and bold adjustments only lead to new OP characters or render characters completely useless.
It is often speculated that "the meta is intentionally shifted to attract the attention of new and returning players." If that is the case, the goal and the method do not match.
The ones who feel dissatisfied with a stagnant meta and the resulting boredom are heavy users who deeply understand the game, whereas new and returning players are not at that stage yet. Therefore, even if the player count temporarily increases at the start of a season, they do not stay. Intentionally manipulating the meta is not effective for increasing the player population.
Class overhauls are planned soon, but I would like you to consider thoroughly revamping not only the classes, but the skill composition of each character as well.