Honestly, I'm a little relieved that they've pushed Pierre back for a future patch. There's already so much to do in 5.2, and dropping a profession just to level engineering to 500 on my main only added to the list. Now that I probably won't have to, I'll have more time to focus on enjoying everything else in 5.2!
Hopefully the devs will rethink Pierre's exclusivity. For a pet to be so expensive, BoP, uncageable AND engineering-exclusive... while I appreciate the uniqueness, it just seems a bit over the top. Balancing it a little wouldn't hurt.