To be fair, my initial reaction to the codex spurred me to write a detailed e-mail to GW on how they should hire me or someone who actually knows what they are doing to handle their rules development or play testing, and it had nothing to do with over-powered or under-powered stuff, but legitimately broken stuff. I didn't send it in, but really, if they want to stop getting massive back-lash with every release for badly designed rules, they need to start hiring people who actually know what they are doing.
I mean, I'm willing to make a bet with them that if I could write the Tyranid codex, it would sell more, it would get far better reviews for internal and external balance, it would have simple rules that made sense, and every unit would be viable. And best of all, that would all happen without making it over-powered. Oh, and I would add in new units that actually make sense, not extensions of the same role we ALREADY FULFILLED!!!
But I guess that's we have to live with if we want to have such amazing models. Thankfully, the Haruspex/Crone are decent enough to justify their cool models, while the Harpy and Exocrine are more than good enough to justify theirs. Considering the Harpy was my favourite model in the release anyway, it's no issue for me at all. I just have to wait a fortnight to even pick up one of them