I'm kind of worried looking at the representation of the mono-black aggro deck among the top performing decks in the Invitational that Copter may be too strong but I think it is also specifically that list which really takes advantage of Copter super will with all the recursive creatures to act as pitch targets and also they allow you to pretty much always have a crew target. The Copter then works to trigger raid so you can consistently bring back more threats even if your opponent sweeps your board. I think it is still way too early to tell though whether this deck specifically or Copter in general are too good. Patrick Sullivan was saying repeatedly in his commentary that he thinks Copter is actually a bad card in mono-red, though he did say it is well suited for the mono-black aggro deck.