Well the smaller and thinner a knife is, the easier it is to control - and control/finesse is what you need when performing bushcraft chores such as making feather sticks. While the BK-2's weight and size does hamper it slightly, such tasks are still completely doable. I personally find the BK-2 to be just the right amount of beefiness: enough so to hack up smaller limbs and baton through good sized logs, but still controllable enough to do fine tasks like
carving up a spoon.
That all said, I'm sure the BK-11 would be a better candidate for bushcraft just because of it's smaller size, lower weight and thinner bevel (I'll be able to confirm that in a couple of days when mine arrives

). Even so, my BK-2 will still be my go-to knife because of it's proven versatility...
Oh, and a pic just in case you don't feel like following the above link