There's also the issue of turning a VN that's mostly inner monologue into an anime where you only get a small fraction of that put into actual dialogue.
As for criticizing his actions, it's a bit more cut and dry to do that in a passive story rather than one where you take an active role. Sure people give him shit for saving Saber from Herc after the church, but most don't know that if you chose the smart option there and run the fuck away, you get wrecked by Illya. It's actually one of the things that I really like about the story is how the sane person option almost always leads to a horrible, gruesome death.