If you need to have particular rare characters to counter a certain team, then I would say it falls under the category of "overpowered." But with the massive amount of characters, skills, and status effects this game has it will probably never be possible to fully balance everything. But I think the best step they could take would be upgrading the old characters to be on-level with the newer characters. The "power creep" as it's apparently called has rendered more than half this game's characters completely obsolete -- even some of the really cool ones that are actually related to Maiden songs, including most Eddies!!! What's the point in a game based on Iron Maiden if the central character is only valid on a month-to-month basis?
Where I go, I do not know
I only know the place I've beenLike the eagle and the dove, flying so high on wings above
When all you see can only bring you sadnessTell me what you can hear and then tell me what you see
Everybody has a different way to view the worldSomewhere there's someone dying in a foreign land
Meanwhile the world is crying, "stupidity of man!"You tell me you're an unbeliever
Spiritualist?
Well me, I'm neither