A green glass midrise was built on Kennedy Square, and the Compuware HQ was built on the pentagonal grass park.

Campus Martius was carved out of the space where all the intersections are. Additional property wasn't taken [[except a small wedge from One Kennedy Square I think), it was just extra space recovered by cleaning up the intersections.

Cadillac Square has been relandscaped, and probably looks completely different but the location hasn't changed.

Also, all the monuments that were there have been shuffled around, so those won't necessarily be in the same places you might remember them.