Fate/Zero is a good(?) show, and I’m sure it’ll get better now that adrenaline is pumped back into the Urobuchi machine. However, that doesn’t change the fact the Fate/Zero can be incredibly monotonous.
Now, the anime is adapted from Gen Urobuchi’s novel, with absolutely zero intentions of it being turned into an anime, unlike most other light novels that deliberately set up to have an anime adaptation in mind. As a novel, Fate/Zero is pretty good, much like, say, Game of Thrones. But in a visual medium, I have to say that it doesn’t really work very well.
The only real problem I have with Fate/Zero is that it doesn’t know how to show and not tell. While the writing is still very good by itself, the show virtually lives on exposition and dialogue, not relying on the strengths of animation as a medium. You know how Bake/Nisemonogatari or Madoka Magica are also dialogue-heavy? Well, I had absolutely no complaints about the dialogue-heaviness because Shaft uses animation to its advantage. They don’t just make you watch talking heads or look at uninteresting backgrounds, but they use quirks and other tricks to keep the viewer interested.
Fate/Zero, by the nature of the universe it is set in, does not have the liberty to be visually creative when it comes to dialogue, and it is it’s biggest flaw. Great animation is very much welcomed, but if you only use it in flashy fight scenes, I’d much rather watch the fight scenes themselves than listen to boring people throwing their ideals at one another.