One thing is for certain. It's not the tables that have weakened U.S. pool! It's the mindset of the current crop of American players. For them good enough is okay. You want to be a champion at any sport, you must do the work and put in the time required. They must be highly motivated and dedicated to the sport, with a desire to continually improve their game, whatever that takes. I don't see that here today. I do see it when I'm in the Philippines where they live, eat and breathe pool every hour of every day.
I like to see players practice on tough tables. But doing that once a week ain't gonna cut it. The very best players are working at their games on a daily basis until they reach a sustained level of excellence. In the last twenty years we've had only one player willing to do that.