The submission as a gift of not has had me a bit confused - I am not sure I quite get what the controversy over submission as a gift consists of, or why it would mean that the sub would really be the top?
As I see it, submission as a gift is a sort of one-off thing. You give it away - there it is, your obedience and devotion, nicely wrapped with red ribbons, to be opened and accepted by the dominant. And then thereafter, it is his/hers.
I cannot see how that would rub the power-relation, rather the opposite, in fact. Or is the thought that submission must be taken by the Dominant, not given by the sub?