After letting 3 dealerships looking at the truck for the annoying rough idle, BMW of Honolulu figured out the problem.

Faulty crankcase breather...they figured it out in about an hour and the truck is idling "good as new" again. The dealership in San Diego was sure it was a valvetronic issue and they were about to tear open the engine.
Glad its fixed and the idling problem was not internal.