Just finished the guide. Good read, seems solid enough (though to be fair I can't fully judge it because I've barely touched the beta). I do have one question/comment though:
You recommend reforging out of mastery and into parry. Is the conversion rate for mastery too low or something? On the face of it the brewmaster mastery seems very useful. I'd think you'd likely be better off reforging whatever the other stat is on any given piece of gear.
It's a very interesting stat, but it's hard to determine its value. You can look at it in two ways:
From an Effective Health standpoint, more master means you take less burst damage. Each individual attack is slightly less likely to kill you. That's not bad, but Stamina does a better job at that.
You've also got to consider the overall Damage Reduction, and mastery doesn't reduce damage by itself. It simply redirects the damage into a DoT, which can then be removed with Purifying Brew. If you don't do the brew, you don't get ANY value out of mastery for damage reduction. So, mastery's DR value is entirely tied to when and how often you use Purifying Brew.
So we've tried mathing this out. And it's not easy to attach a number value to it because it provides EH and DR, but it keeps coming out behind the damage reduction that avoidance provides over time.
Now combine that with the fact that you and everyone else who is new to Brewmasters are probably not so good at timing your Purifying Brews at the most optimal moment. So you probably won't get the same value out of mastery as a simulation.
Considering that, I feel like parry is the clear winner.
However, I'll also add that you probably won't notice a large difference either way, and if you're sharing gear between your Brewmaster and Windwalker specs (as players often do at the beginning of an expansion while gearing up), reforging mastery would be a better idea.