I just found this just after publishing my article.
Beast Mastery is over-nerfed and could be buffed before Ulduar
We talked about it a great deal today and agreed that we probably over-nerfed BM. Marks is in a good spot and Survival might be too high once we look at the changes we are making to all other classes.
Our plan is to buff BM before Ulduar, but I can’t give you a timetable more detailed than that, and things could change for any number of reasons. We are unlikely to touch Steady Shot for the reasons I have mentioned before. We are more likely to look at Kindred Spirits and Serpents Swiftness again.
Again, huge caveats: Predicting changes we are discussing making but haven’t made yet is fraught with peril. I only wanted to address this issue because it caused a lot of consternation in the community.
I don’t mind admitting when we make a mistake in the hope that it builds our credibility in the community. This was one. It won’t be the last. (Source)
When will they buff it up again? We have no idea. Stick with BM for now if you like, or like me, try out a different spec while BM is languishing. Whatever you do, don’t release your spirit beast into the wilds.