Rivers is a combo guard (starting to see a theme here). He's probably one of those kids who could have used some more seasoning before entering the draft. He seemed like a pretty solid scorer in his Freshman year at Duke. He hasn't exactly panned out in the NBA so far though.
That being said, he's only 22. If people here hung on to the hope that Rondo would take a leap at the age of 29, I don't see why it's so far fetched for a 22 year old to do so. Not saying g he'll turn into a star but there is potential there. Maybe he just needs a change of scenery/new system. I'm interested to see how he fits CBS' offensive system w/all the pick n rolls, etc.
Overall, Rivers seems like a low risk, high reward type of gamble. It's not like the C's are going anywhere this year so might as well see what happens. Maybe they'll get lucky for once.