I think you have a point, but then this is mostly due to the fact that injuries plagued and ruined half of the season last year and also right now.
Having said that men tennis is getting exciting, coz players like Federer, Agassi, Hewitt Safin, Roddick, Ferrero, Nalbanian etc. are really stepping up their authority over the rest of players, and the second week gonna be so exciting. However here come a hypocrisy.
I was watching BBC just now, and they are just all praise about how it is gonna be so exciting with so many household name advancing in men tennis. But they are complaining that there are not so many big names in women tennis. At the same time it was them who complain about the lack of depth in women tennis a couple years ago when the top 5/6 women really slaughtered the draw until the quarters (yes I am talking about you Andrew Castle
) In the end, average viewer want to watch matches which involved match with names which they recognised, most people will be happy to turn on their TV and watch Williams vs Kournikova for example even though most people know that Williams will win.
I disagree that it is all going downhill for women tennis though. If we are lucky, we will have at least 5 more years for the sisters and Belgians as they seem to want to haeva long career, eventually there will be someone who will be stepping up and challenge them as well. WTA need to have a more clear and focus marketing strategy. But in the end there is a limit for what they can do, there will always be a prejudice over men sport whichever way you look at it.