Isaiah Thomas has a lot of potential, so that wouldn't be a bad return for Rondo. Not great, but not bad by any means.
Not sure why people are so obsessed with getting McLemore, though. He was one of the worst players on the Kings last year, which is saying something. He didn't show any signs of improvement. He's a bad defender, a bad rebounder, a bad passer, a terrible scorer (32% from inside the arc ... ugh). Not sure what anybody sees in him. Just because he's young doesn't mean he has potential. Is everyone just slobbering over that one good game he had against the Suns?
I don't want anything to do with McLemore, and a package of him plus the 8th pick isn't enough for Rondo. Not even close. The only players on the Kings of any interest are Thomas and Cousins, and they ain't giving up Cousins. I can live with Thomas and the 8th, though, that's a good trade.