When I first heard about Cars Land, Luigi's Flying Tires was the attraction I was least excited about. But I went on it, since it was new. I was surprised at how much I enjoyed it. Maybe low expectations helped. I actually prefer it without the beach balls. I found them a distraction. The only thing I don't like is the long wait, but then again, the theming is flawless.
So, no, I guess I wouldn't want it replaced.
I wouldn't miss Mater's Junkyard Jamboree, though.