Here's a good example of my point, the ubw movie. It tried to slash and burn the source all to fit it into a movie length feature, and what we got is a mess. Nasu made FSN different from Tsukihime. Tsukihime can be played in pretty much any order route wise without losing anything. FSN is, like I said, like a mountain. Fate is the base and ubw and hf twin peaks. The whole thing only works when you put it all together. Any one part missing and the pay off isn't there. Like Ilya, you learn her character in fate and when UBW rolls around and that happens it's not just that Gilgamesh killed someone it's that he killed a nice person, a terribly pained person at that. So of course you want to make Goldie bleed from the eyes. But that further stretches into hf. Couldn't save Ilya before but now you can so the moments intensity is through the roof. Point being, the idea of leaving anything out makes a flaw product but here it takes the steam out of the train.