almost no rock suit stages

i just got to world 6 in super mario galaxy 2, and i just realized something horrible. the rock suit is in ONLY ONE GALAXY FOR THE FIRST 5 WORLDS! i know it will probably appear in world 6, but have you seen how many times the cloud suit is used? not only were there 2 or more entire galaxies completely dedicated to it, but you can even use it in the hub world and (SPOILER!) one of the bowser jr. battles, plus a whole lot of cameos in completely unrelated galaxies like puzzle plank and shinestar! and the rock suit? it's only in ONE GALAXY! 

what do you think about this?

I've noticed this too, and I'm not too happy with it.

I do believe they're in at least two.  I'm more disappointed by the lack of Yoshi.  I don't particularly like the Rock Suit that much, because it's too hard to control, and you can't stop once you start rolling.