S.B. confirms it that if someone follows all the rules and regulations very nicely but doesn't come to Krishna it is useless, and similarly if someone comes to Krishna, even if he doesn't follow very nicely, he is perfect. Also, B.G. 7/19 says that the wise man after many births comes to know that Krishna is everything. So Krishna is central. So we may begin our chanting with some motive, but that is not the final stage. Love of Krishna is final, and how can we develop that unless we are chanting and thinking of Krishna?
5) Some analyst or priest or lover may widen the consciousness from this to that, but only Krishna is without limit and therefore can widen the consciousness infinitely. That is the difference. The material world has varieties of this and that, this thing more than that thing, but only Krishna is without limit, and if we desire ananda, bliss unending, we must go to Krishna.
6) Hare Krishna cannot be compared to any sexual cry because the sexual cry is a call for some partner to come satisfy the caller's desire. That means it is sense gratification. When we chant H.K. we are calling to Krishna to please let us serve You. So on the spiritual platform it is the service that is desired, but on the material it is sense gratification that is sought. The rest of the points I think you can cover nicely.