if there were no Nadal, Fed will complete Calendar Grand Slam 2 times (2006 and 2007), and he will have 17 + 7 (2005,2006,2007,2008,2011 FO, 2008 W, 2009 AO) = 24 slams! So, I guess you really do not want Nadal to exist!
But I do not want to see a single person winning everything, that is boring. I am happy to see the trivaries between Fed, Nadal and Joker. And I hope Murray to join the party as well. That is what really matters to tennis!!! Tennis wins when there is a great rivary!