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.
Rewatch Bonus: Heavens, yes. Lots of foreshadowing (such as Jay playing with toy swords while Shel gives Sam a piggy-back) and subtle hints as to characters' true natures (such as Fiona's description of her profession).