The reasoning they use does sound correct doesn't it?
Ask Steve Hassan [the worlds foremost expert on cults] if the doctrine of the Moonies sounded correct. He will tell you it did - and that it drove him to join, and recruit others. Years later it took a major effort to get him out of that cult. They always make it sound right - like it is the only 'Truth'.
As far as the doctrines you mention - Jw's are not the only one's who believe in using God's personal name. Many use Yahweh, some use Jehovah, others a differing variation of the tetragrammaton, almost all Christian churches use the name in song and praise, though less frequently than Jw's do.
I am very close to my earthly father, love him dearly, and have molded much of my life based on his wisdom and training. Yet, not once, formally or informally, have I used his personal name of address, except in identifying him to others perhaps. I feel much closer to my father by showing him respectful address using the title that makes him special - my dad or father. Jesus seemed to use the same pattern - he never once prayed to Jehovah by name [even in the NWT] - it was always to his Father - that is what made him close to God - not the use of the divine Hebrew name of God.
And much of what you are learning with Jw's is 'time tested'. That is, they know that it sounds good to the ear - especially the uneducated [from a biblical perspective] ear.
Michael - I am PM'ing you my phone number. I would love to talk to you sometime. I must go for now - but please look around here. Investigate Investigate Investigate. 'Truth' if it is such - has no enemy in investigation, though Jw's will tell you not to do that. Give yourself time before you committ. Say six months. If in that time, you are still convinced [after honest investigation] that it is the 'truth', let me know. I will come to your immersion personally. If not, you will have reasons too solid to discuss here in a few minutes time, believe me.
Jeff