Those aren't "isolated moments" anymore than they are in any FF game, they are literally everywhere throughout the entire games.
If Zack taking a vacation in Costa del Sol in his swim trunks and fighting with a beach umbrella, playing tag with Yuffie throughout the world, joining SOLDIER fanclubs that poke good fun at the fangirls of the bishounen characters, doing missions at the fucking Chocobo Ranch, building a flower cart with Aerith in the slums with everyone helping out, seeing Wall Market references again, making friends with FF mascots as summons, seeing the old school enemies of the franchise again in FFVII's style, not to mention the myriad of other callbacks like in BC with the callbacks to every memorable location and OG character, DC with Cait Sith and Yuffie hamming it up, AND the other games easter eggs that exist in AC which reference the OG, are somehow just "isolated moments" then you're essentially blinded by the cloudiest of nostalgia goggles at this point. Nothing is going to be good enough for you unless its like...a 1:1 recreation of FFVII down to the lego polygon models.
All just feel poorly done, and off-hand in my eyes. The attempt is there, but they don't feel well executed, and there's a lot of padded grind time between those moments. They just don't work for me. I didn't need silly one-line fangirl jokes in the original, why do I need them in a prequel?
None of it feels connected to the irreverent, earthy, and oddball tone of the original. It just feels...bleh.