I didn't watch much of the World Series at all, mostly because it was the final steps in the completion of a money-fueled almost predetermined plan. Though money doesn't guarantee championships, it sure does make it easier to make mistakes. Most teams could not survive the disasters of Carl Pavano and other failed free-agent signings a few years ago, but the Yankees can turn right around and sign CC Sabathia, A.J. Burnett and Mark Teixeira in one offseason and basically buy a championship. If the Nationals had signed Sabathia, Burnett and Texeira last winter, they would probably have been one of the top teams in the league.
I suppose if you have the money and you're willing to spend it, then you should go ahead. But I don't think it will be good for baseball in general if the Yankees begin to dominate the league again the way they did at the end of the last decade. There was so much hope for opening up the playoff club to smaller-market teams when Tampa made it to the World Series last year but maybe that was just a fluke. It's not impossible for small-market teams to win but it takes a lot of luck. Most of the playoff perennials are the big spenders/large-market teams while the bottom tier of the league (Kansas City, Pittsburgh, et al.) is made up of small-market teams.
I'll still follow the Nats and watch the games next year but I'll probably watch even fewer national broadcasts than I did this year. I only watched a couple national games all year as it was (those not involving the Nats). I barely watched any of the playoffs. I hope baseball changes its economics in 2011 (?) when the next round of collective bargaining is supposed to begin.