To answer your question on the 2 point shot, I believe it was felt by many that this created a stagnant game dominated by individuals trying to score from outside 7m — in some ways led to less scoring rather than more since the percentage shooting from there was less.
I agree the ball under gets called a lot at center when the center defender reaches over the center and pulls the ball under water towards them. I’m not in favor of this call as it definitely doesn’t fit with the rules stated.