If you give me 2 minutes, I can get my act together between the worst of errors. Tennis is a sport governed by rules, and those rules don't say "serve once you've been able to regain your composure," they say you have 25 seconds. If you can't get yourself together in 25 seconds, then you shouldn't win the point - tennis is supposed to be as much a mental contest as a physical one. Seems that having a caveman like Nadal at the top of the sport for too long has made everyone forget this.
Sure, poly strings are part of the reason that the game has changed - they comply with the rules of the sport, so while I would like them banned, I can live with them - but when you stop enforcing the rules and that changes the sport, I have a big problem with it. A huge problem actually...