Did another run of Heroic Utgarde Keep this morning, and got my crossbow.
I also had some more feedback from the forums earlier, which led me to try conducting the following experiment.
I went to the Beast Mastery Bible on Elitist Jerks and followed their instructions. I got the 50/21/0 spec, stayed with my cat rather than a Scorpid after being told that Scorpid Poison was only good for long fights, respecced my pet for Call of the Wild, got some more Agility consumables, and then got and used this macro:-
#showtooltip Bestial Wrath
/cast Kill Shot
/cast Bestial Wrath
/cast [target=pettarget, exists] Scorpid Poison
/use Scarab of Isanoth
/cast Blood Fury
/cast Kill Command
/cast Steady Shot
The result, in H UK, was 1.5k single target DPS; 100 more than single target with this spec, but 500 less than what I got with that spec and almost pure use of Volley in Heroic CoS. Yes, this damage is bad, or so people claim, but my gear is still bad atm as well, I admit.
I'm going to stick with this for a couple of days, (mainly to test the difference with a Scorpid) and then probably go back to the above hybrid until the patch comes; this was merely to demonstrate a couple of things to myself.
a) That I'm not totally useless when it comes to using BM. I wouldn't want to use this for questing myself, but it is not entirely unenjoyable in an instance. If I keep Viper up between fights, mana efficiency is very good, and it was a good test to try and get used to keeping Mend Pet up constantly and keep track of my pet more, as well.
b) That the DPS difference is nowhere near as large as what many people claim. I was using BW every cooldown, and Readiness on longer fights as well, and even with that, my trinket, and Blood Fury built into the cooldown, the difference was, as I said, around 125 DPS between this spec and the Marks/Surv hybrid.
Where BM produces the massive results seen in raids, is due to the ability to stack Call of the Wild multiple times, with multiple Hunters using it in synch; it is a multiplicative, synergistic effect, and was apparently also unintended.
c) That I am not as inflexible, or as ignorant, as most people on the Hunter forum seem to insist on thinking. I can use BM; I've had top damage with both it, Surv, and my usual Marks/Surv hybrid in both battlegrounds and five mans before. So I reject the assertion that I am ignorant or that I don't know how to use the tree.