I don't think anyone in this thread has said the film should have been 100% faithful to the novel.
And I'm not saying they did. I'm saying that
I, Robot isn't a single cohesive thing to begin with; it's a loose sampling of a fraction of Asimov's positronic-robot stories, specifically the fraction written before 1950. So even defining what "faithful to
I, Robot" means in the first place is far from elementary. Faithful to what parts of it? What aspects of it? There's no single plot to be faithful to. Ellison's screenplay is evidently more or less faithful to the unifying conceit of the collection, the interview of Susan Calvin as a framework for the stories, but that frame is a somewhat artificial imposition on the original works.
I guess I just don't have any intellectual or emotional loyalty to
I, Robot as a distinct and separate entity. To me it's just the earliest piece of a larger whole, a loose agglomeration of the first nine of several dozen stories in the series. I don't see it as something that's complete within itself, just as a sliver of something bigger.
So tell me, what is "faithful to
I, Robot?" What does that actually mean when we're talking about a loose and non-comprehensive anthology like this? It doesn't have to be fidelity to the plot, because there are nine plots, ten if you count the frame. Fidelity to the characters? Sure, I can see that. Creating a film that's built around Susan Calvin and Alfred Lanning and Steven Byerly and Gregory Powell and Mike Donovan would certainly be more faithful than one that's built around Del Spooner and Susan Calvin and Alfred Lanning. But there are Susan Calvin and Steven Byerly stories that aren't part of
I, Robot because they were written after 1950.
I, Robot is a nebulous concept. So I think if someone wants to tell an original story arising from the Three Laws and including Susan Calvin and Alfred Lanning, and they decide to call it
I, Robot, I think the definition of what
I, Robot is in the first place is fuzzy enough that I don't have a problem with that.