Yeah I agree with you. I once had a Fallen Druid and and Elite Otyugh and my oppenent, a half-blood, used a Chimera and nearly killed me the next turn but I mutated it and then I devoured it. The Chimera had 20+ attack and 40+ defence.
Chimera i guess is good for if you have alot of Malignant Cells or Skeletons or anything that's 1|1. That way, if they Plague or Firestorm or Lightning storm you, you dont suffer great losses.
Or, if your about to win and you have all these great creatures out, you could play the Chimera for a little fun and see how much damage and defence you can get.
I one had a 108|156 Chimera.