Oh ok...I checked some of them, and I'm a bit confused on few things...
Serena Williams, her forehand and backhand power are below 50%, and yet in real life her shots are probably the most powerful on the WTA tour. Also her serve is one of the most powerful ones.
On the other hand you have Mauresmo with around 75% power on both wings, yet she isn't one of the most powerful hitters on tour. She does have a lot of topspin on her shots though, more than any other player perhaps, yet you have her topspin at around 32%, which I think is way too low, especially when you have far flatter hitters such as Mary Pierce, Lindsay Davenport, Maria Sharapova, who all have very little topspin, having as much or even more topspin than Mauresmo.
Venus too, one of the most powerful hitters, yet her power is quite low. Also she held the record for fastest womens serve for a long time, over 200 km/h so her service power should be far greater than 58%. Actually Serena recently tied this Venus's record so Serena's serve power should be above 39%.
I checked most of the top women players stats, and as far as I can tell, most of them are a lot off.
The men though seem very good, although I would change some things lol.