I am keeping my Procerathomimus!
First of all my Procera is lvl 29. The speed is reduced to 127, and isn’t that problematic with a few boosts. Procera’s new weakness is being able to slowed down now. Otherwise most of the immunity is kept in the resistances. The damage is about the same. The main problem is a much lower health. After 15 (!) health boosts it only has 3889 health.
While everyone focuses on the negatives and the nerfing, I will argue that Procerathomimus got new advantages. Its Cunning Strike lets it distract the opponent the turns while waiting for Distracting Rampage. And now the best part; Procera now has a new nullifying counter attack. That means each and every time an opponent attacks it, their positive effects fades away! So I’m over all happy with Procerathomimus 2.0