I like the stats he put in April games up based on that link you included ... however, I have no idea of what his game looks like right now.
Sounds great but I don't know enough about him. The price would certainly be right, so I'm not sure why people would be so opposed. Rondo definitely needs a backup. That much is obvious.
Resting him is the smart thing to do, and having a capable ball handler in reserve is a no brainer.