It would avoid redundant comments if we could simply 'Like' comments. A Like counter would indicate how many others sympathized with the point made. It would be ideal to see who else liked the comment.
Like comments in ideas portals 👍
Enable comment likes in your ideas portals to encourage engagement — and understand what feedback resonates most. Go to Portal settings -> Overview ->Type -> Likes and check Enable comment likes. Portal users can then add a like to any comment and see the total like count. When you review the idea inside Aha! Ideas, you can hover to see who added the likes.