A small detail that seems to not get noticed is SHIKI taking out the White Cat which visually represents SHIKI being Yang of Shiki Ryougi's dual personality. Also the cat plushies themselves being Len and White Len is great reference on Ufotable's part to include it in the movie.
I do dislike Fate revolving around Grail Wars when they're much more interesting pieces of the universe you can dive into. However, Fate/Strange Fake completely changed that idea by using the HGW formula to utilize and expanding upon those interesting aspects within Type Moon.
