hidan is NOT op.
there is a difference of OP, and a very good card.
Hidan itself generates BRs when your in a winning position. However, if your in a losing position of field presence, BUT your opponent has enough BRs to game.
Hidan gives you the position to go for game, using his reinforcement. He can also be used in a variety of siutations.
Betrayal and Fire Lord are +1, but in the case of betrayal, its +2. Its like saying, i pay one BR and 2 cards for a warhawk effect. Then, ill just give you one more BR if i want a 5/0 ninja to swing for 2 BRs.
Hes SEARCHABLE with bartender cat or any tutors for fire symbols. Which is dumb because he doesn't have ambush.
Hidan poses himself as a verstaile toolbox to almost any element. You splash some fire or lightning, play hidan. The chances are in a swiss tourney, you can see that you'll use hidan (CM) at least once to win you a game.
There are more situations where hidan is very good, but im pretty sure you played him enough to know how he works for almost every deck that splashes fire/lightning.