There playing great. I have no idea why you try to change your team up. They are having there best season ever. Even if it is Garnet you never know what could happen.
When you're part of a franchise that has never won, management starts to over think as to whether they are good enough to win as is.
Plus also with the Lakers down and out, the Clippers know this is a big opportunity to "overtake LA" by winning a title.
Garnett would be a good move for them IMO, but like you said, you never know what could happen. Chemistry is a huge part of winning a title and the Clippers probably have the best in the NBA at the moment.