One of the things that get me a little bit frustrated about Buffy being in heaven is that I feel after she confessed it in OMWF, we never got to see any of the characters truly voice theirs apologizes to her. I wish we could've gotten a scene of Buffy/Giles where Giles is comforted her or Willow's apologizes. In the very next episode, it seems Buffy was going to say something but then everyone lost their memories. So the no follows up bothers me more when I re-watch.
That was such a huge reveal...