I think the tennis is as good as ever, really...I think there is something lacking though, personality. Unless you are an avid follower of the WTA Justine Henin is probably the most boring number one ever.
To the average fan she will never say anything of interest, she looks anxious on court looking to her box ALL OF THE TIME and she does pretty much nothing.
Tennis is not just about watching the tennis, like all sports, it is also about connecting with the players and personalities.
For us, we know Henin's story, we know how interesting her post-match interviews can be and how intriguing she is as both a player and a person. To the average joe she must be a BORE. Same goes for Mauremso, Kuznetsova and others.
(a lot of these are my fav players).
Unless you are REALLY into the WTA then so many of the players must seem boring, with the exception of Sharapova (everyone talks about her looks, endorsements etc) and the Williamses. They are not necessarily interesting for the right reasons but at least they catch the interest of the average viewer.
As far as the tennis goes I think we are at a great point in WTA History. It all depends on injuries, if all of the top players play at this USO it will be a GREAT field. Sometimes you just cannot help injuries and such, especially considering the commitment now required to sustain a good ranking