Well, yeah, I'm thinking more of the fact that Sakura is obviously really unhappy (Rin acknowledges in HF that she noticed that).
But, yeah, I definitely see what you're saying there. The whole "let's do an alternate Grail War" thing is massively overused. Something different would definitely be good. I guess that a lot of it is because of the popularity of the servants (I would say that, overall, they're probably more popular than the masters), which means people usually won't want to write stuff that excludes them.