Aaahhh, Rufus/Cloud, how I love this pairing and how lovely they are in this fanfic. I like this pairing because it lacks fluffyness, romance and other sweet things and that fits perfectly in a dark Post-AC atmosphere, which I love, too. Rufus last three words made me shiver and sighing on the same time. It's a little bit depressing, but in a sweet melancholic kind of way. Thanks for posting this, hope there will be more with this pairing.
Oh, and by the way, I totally agree with your writing teacher. I'm not a friend of switching POVs in general (most of the time, although there are exceptions and it's okay to switch with a new chapter sometimes), as a reader and as a writer, and it's exciting to know only as much as one character while reading.