The flexibility of those cards is what makes them great. I usually keep them for the buzzard turn but if you happen to draw them after you can still use them for the combo (either as damage spells or tokens for Shadow Hunter Vol'jin). I also recently added Kolkar Pack Runner to this deck for a more reliable draw engine and anti-aggro. Sadly this deck still loses to most meta decks (mainly APM mage). If you face a lot of APM, a secret version of this deck might give you better luck.
I will update the decklist.
As long as your opponent isn't hyperagressive it works surprisingly well. The deck has a lot of ways to tutor buzzard and once you do that you're good to go and can basically draw your whole combo. Good luck if you decide to try it out!
My favorite card so far is Dinotamer Brann, because everyone needs more King and more Krush in their lives.