lilmod,
What tools do you have to evaluate the respective gadlus of Reb Moshe or Rabbi Miller? Did you know them personally, observe their ways, and ask them questions to make such a determination?
Furthermore, you are entitled to disagree with either or both of them. If you asked one of them a halachic shaila, you would be obliged to follow their psak but outside of that you may disagree.
Chas v’shalom that what I said should be interpreted as supporting a man’s refusal to give his wife a get once it is clear that the marriage is over. My point is that she (or he) shouldn’t be asking for a divorce unless the situation is one of the ones I laid out above.
I know that there are those who disagree with my position. I think that they are wrong. If you hold that position, I would suggest reading a dozen memoirs of people whose parents got divorced when they were children and see if that changes your mind.