Here is the Beast cardset.
Common cards which are fine:
Baku, Centaur tribe, Dire wolves, Fire fox, Giant bear, Minotaur, Petrified minotaur, Thunderbird, War wolf, Warhound, Werewolf, Wolf spirit.
Beasts have one of the best common cardsets in game. There is not much to fix, except Abyssal viper which I would like to see more relevant to Beast (additional Beast token gain?), Forest guardian which needs a minor flat attack (3 would be nice) and Shadow wolf which could use some defensive or stock increasing effect if no card was discarded.
Uncommon cards which are fine:
Basilisk, Forest spirit, Imperial griffin, Keeper of souls, Vulture, Wolf raiders.
Giant spider. Part of Frenzy deck. Won’t be effective in Beast deck without complete rework or reverted Frenzy nerf. Another suggestion – remove Beast keyword and leave it with Frenzy.
Griffin. Too expensive in recruits. My idea: maybe move a part of its cost to gems, something like 3G/7R?
Nightmare owl. Another card which is irrelevant to Beast deck. It’s a part of Illusion cardset. No idea what to do with it.
Roc. Attack 22 for double Giant spider cost wasn’t so bad, considering Horde keyword and additional effect. Attack 17 is definitely too low. My idea: I’d buff its attack somehow. Maybe even with Siege and slight direct tower damage (up to -3).
War elephant. It became too heavy with previous Frenzy nerf, and now on top of that it’s too hard to use in Beast deck. My idea: raise its base damage to 38 + (#Beast + #Barbarian + #Frenzy) in hand.
Wolf mistress. Again, attack is too low, cost is too high. My idea: 10 attack, 6R cost would be great.
Rare cards which are fine:
Beastmaster, Byakko, Centaur trainer, Cockatrice.
Frenzy rares. Those Beast/Frenzy rares… Now only Chimera which even wasn’t THAT good before this change is somewhat useful (although I’d take Flood over Chimera every single time when I need to utilize gems). Oh, and Manticore with triggered Frenzy can do somewhat visible amount of damage. The whole idea of cheap rares with big attack/cost ratio doesn’t work anymore, because they should have an attack that can be actually noticed by opponent. When a rare has attack 12-17 (bad uncommon level), 15-22 (mediocre uncommon level) or 18-28 (decent uncommon level), there is something wrong. I don’t know what to do with these cards, to be honest. Swift instead of Frenzy? Additional attack? Some kind of Frenzy rebuff? Lowering its level to uncommon? I don’t know. Really.
Crimson hawk. Same, but it’s better because of Far sight. And yes, I have no idea what to do with it.
And we have ONLY THREE RARES that can deal a reasonable amount of damage. Hand-dependent Beastmaster, weakened Chimera and Byakko which is irrelevant to Beast. Cockatrice isn’t for attack, Centaur is a support. BTW, remind me, why Centaur champion isn't Beast?