Fin is powerful, but not overpowered. Its benefit is just obvious and easy to take advantage. And I'm a bit sick of people keep saying nerf this nerf that whenever something is stronger. If it doesn't break the game, then keep it. When I have a bad day I pull out Liz or Wilem to have some fun, still I may get rushed by those lowly leaders like Montzy or Toku before I get my advanced army in almost 1 out of 3 or 4 games.