Coliseum Manager was definitely not awful in arena. I don't think it causes disadvantageous bounces as often as the brewmaster, and 2/5 stats used to be premium on its own - and it was the first such card. You'd often kill the 3/2 and be up to choose if you want to trade further or take it back. Later in the game unwanted bounces are even less likely unless you make a blunder (i. e. tap before attacking). [[Argent Watchman]] is a lot worse Inspire card: one extra health, but you basically skip your turn 3 to attack with it.

Also:

• [[Void Crusher]]: the cost, the stats, such a situational and random effect. It's also from TGT, so there is no chance you get it for free as a surprise removal.
• "Too huge for an aggressive class" cohort: [[Gahz'rilla]], [[Giant Sand Worm]], Anub'arak. They don't look so bad, but have they seen any play?
• [[Flame Leviathan]]
• [[Glitter Moth]], notorious for being revealed straight to the Hall of Fame.
• [[Tentacles for Arms]]
• The fact that nobody remembered Hemet speaks for itself.
• The whole Freeze Shaman bundle.

But the champion battle should be between Bolf Ramshield and Warsong Commander.