There's no such thing as a redundant review. Anyone who thinks so is missing the point of what a review is.
Nonetheless, I understand the OP's frustration with the unoriginal bolierplate language we too often see.
I do want to point out, that in the default display setting, the most recently submitted review is at the top. If I've never read anything on a course before, the most recent reviewer is the one who's going to get me familiarized to the place, whether he's the first reviewer or the 88th one.
Now if I'm jaded to the same old, same old verbiage from the 88th review of a course, because I read a great deal of the previous 87, well, that's on me. Mr. 88th reviewer should be granted the same privilege of speaking his/her mind as if he/she were critiquing a lesser reviewed venue.