Do you have issues with Urobuchi's character writing? Mainly referring to how his characters are more of a representation of a specific idea (very prominent in F/Z) rather than rounded people.
It's only really the Servants who are really simplistic in Fate/Zero, and that's intentional, so I don't really have a problem with it. As for his other shows, I think Madoka has plenty of solid characters, and Akane is clearly a multifaceted and evolving person, so I think the complaint is pretty misguided. People see his characters making big speeches and think that's indicative of bad character writing because it's not naturalistic, but very little writing /is/ naturalistic, and that's not a flaw. People should read more books.