Krishna explains in the 7th Chapter of B.G. that there are four classes of men who approach Him. There are millions of men in distress, or searching for money, or curious, or searching for knowledge, but only a few come to Krishna, and all of them are mahatma—simply because they have come to the right place, Krishna. That is not by chance, but due to their past pious deeds. No one can approach Krishna without being purified, so this is the process. But no matter what the original motive, if one actually comes to Krishna he is mahatma. 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. Hope this meets you in good health.
Your ever well-wisher,
A.C. Bhaktivedanta Swami