Whilst I can be as romantic and nostalgic when it comes to appreciating the sublteties of sport, what it comes down to is that the best tactics to win (so long as they are within the rules and 'spirit' of the game) should be employed. If a cricketer who is more athletic yet less 'skilled' in terms of batting (for the eg. of cricket), breeds better results than the skilled batsman, that is the way the game will go whether people like it or not.
The only way to prevent this from happening is to change/modify the rules to accomodate for the changing nature of the sport (whichever it may be) to ensure the game stays the same. Now if stronger and fitter cricketers are proving to be superior to those with less stamina yet more skill, then maybe a change in boundary ropes, or bat size, or pitch conditions (these aren't solutions, just examples of possible changes) will be made if it is deemed necessary. The public will demand it however.
Fact is, if the sport gets 'less attractive and entertaining' due to a changing nature of the game, it will show in audience and viewing numbers. Honest's example of tennis I disagree with. The whole complaint about power overriding finesse is incredibly exaggerated in my view. As much as I love the serve-and-volley game of Rafter or Henman, I will still take a Safin vs. Roddick match over them. Why? I just find those two slugging it out more entertaining, and if power tennis breeds better results than a serve-and-volley (for example), then the game will naturally adapt that way. If the fans as a whole don't like it, it will eventually change, either through limiting raquet technology, or slowing court surfaces etc.
I just get tired of hearing every time I tune in to a sport, whichever it may be, that the game is not as good as the old days. FFS, I get extremely nostalgic about the cricket and worry about the way the game is heading towards batsman, but even I find these calls that the game is heading to hell a bunch of hyperbole.