Well, your poor puppy is not loco, she's just a puppy. A puppy of a hyper breed. I know, we got our BC when she was 10 months old. She did many of the same things yours is doing. She chewed on everything, dug holes if left alone at all outside, jumped, climbed trees, you name it. Keep working with her and you will have a faithful companion.
We taught our BC to play soccer with the kids and she is a killer defender! I know it seems that she is nutty at this age, but give her some time. Our BC, who I was convinced was one of the dumbest dogs on the planet, is now, with some patient training, the smartest dog I have ever had. She knows our kids by name. She will politely go into her kennel when she sees me carrying anything in or out of the house. She learned that on her own because I would kennel her when I brought the groceries inside.
It sounds like she has a very submissive personality. Ours is the same way, she used to drop to the ground and lay on her side every time we bent down to pet her. It made her tough to train because she had no confidence. But, again, patience is key.
Also, I would try to fit a LOT more excercise into her schedule. BCs could go on a 3 hour hike every day and still not be worn out. I love the idea of doing agility with her. Get her basic commands down and then go for it!