Leo, denuseri is saying (please correct me if I am wrong denuseri) that whether a sub's brattiness is desired by the Dom or not, it's pretty predictable and eminently manageable if you recognize and look for the completely natural patterns of dominance hierarchies, and not recognizing and reacting appropriately is a failing of the Dom not the sub.
Likewise, topping from the bottom isn't really a failure of a sub. It's natural hierarchy testing behavior, and a Dom can either react to reinforce the hierarchy or not, as he decides. It's silly to choose to allow the hierarchy to become confused, to be unhappy with the result, and then complain about the sub. He's whining about biology and his own shortcomings, but putting them on someone else.
I think most subs in most consensual relationships _want_ a clear hierarchy and will be happier when it and it's maintained. If there isn't one it's her dominant's fault, not hers.