For mine I don't think we have seen anywhere near the best of Cook yet,he has been under Hasler & Madge both very structured in their approach to the role a hooker should play.
I hope Seibs lets Cook off the leash at hooker as I have great confidence that he has plenty of running metres in the right directions adding up to many try assists.
Defensively he's no better or worse than Farah,so we won't lose anything there,IMO his mojo suits our younger lads better and would add to the free flowing footy I hope we can rediscover!