What is curious about the opening post is that all these questions have existed for hundreds – or perhaps thousands – of years. They all have been answered by many rabbis, and many of the answers are even published in various books. If you seriously want answers to these questions, you should ask your own rav. And if you don’t like his answer, you are, of course, free to find other ravs, until you get one who gives the answers you want.
But we must remember that what we seek in davening is not what the ravs want, but what Hashem wants.