I did get my top choice in Michigan. I'm unsure of what you mean by rotations outside of 'KCOM's system'. Do you mean outside of KV, outside of Missouri, or as electives during the 4th year?
As far as how the class does, a rough estimate is 85% get their top choice. If you get 4-6th choice they let you trade. Some people don't match at all and "scramble". These people are very often in a better position as they get to hand pick from unfilled slots. Each site has it's own number of slots, and there are a total of more slots than students, so there is often a nice choice if you're one of the few who don't match. Everyone who scrambled in my class was very happy with where they ended up, and many were actually able to go to some of their top choices.