MM just out of the question?
For puging go BM. At least you will be able to coordinate 3 different stuns while the rest of your team hits random buttons. Survival can dish out alot a damage but its not burst and is just not as useful as the cc.
My hunter is a beast master as well. With the pandaren racial and the crane's ability, it gives me six different CCs to use.
I think the real question here may be how do you feel about playing objectively in a PUG? I always play objectively no matter what, so the decision was very easy for me.
I am usually the only Alliance PUG on the efc.
There's a reason why everyone went BM and that is because it is simply better. No1 should be using KC that much as BM so physical damage shouldn't be counted against good BMs. Really doesn't matter cause a good SV or a good BM will be leagues above 90% of the other hunts in this bracket and still better then 75% of the other dps you will face. However against healers BM definitely holds the advantage and that last reason is why I personally went with BM
TL,DR: If you want to combo a scrubby healer, go BM. If you give any credit to the rogues/paladins/warriors on your team, SV is the choice for you.