These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Brilliance: Why did Kunsel become Cloud's friend? Kunsel is the only person that Cloud didn't know in the original timeline and thus the only person Cloud wouldn't have any bias against.
Fridge Horror: Think of all the friends Cloud left behind in his time...
Harsher in Hindsight: Cloud's assured that Mayor Lockhart is only anxious about Cloud's good looks and that he's afraid Cloud will "leave a trail of bastards behind [him]". Guess what Cloud's father did?
Rescued from the Scrappy Heap: Loads of readers found Genesis a ton more likeable in this fanfic than in canon, after Cloud prevents him from Jumping Off the Slippery Slope via curing him. Even his constant quoting of "Loveless" is used rather tastefully, particularly with how the various quotes prove relevant to the various scenarios the characters end up in.
Tear Jerker: How alone Cloud is. Tseng even notes that "there's something sad about ... a phone filled with numbers to nowhere".