I think we've seen enough "revised" color palettes to make people suspicious - and the original BD of "French Connection" puts Friedkin on the "guilty until proven innocent" list!
But anytime an older movie hews toward colors that don't "feel right", we're gonna suspect alterations.
When I plopped the "Exorcist" 4K into my player and saw the orangeness of the Iraq scenes, I couldn't help but think changes occurred.
But honestly, as this thread shows, it's hard to nail down "original colors" - or original anything - much of the time.
I tend to just go agnostic when I review titles like this.
Unless I have strong evidence the image has been severely mucked with, I just rate what I see onscreen.
Mr. Friedkin was a very big, domineering personality and he got his way with wanting to tweak things and making his films a little less 70s for these re-releases. You've heard stories about him (or have seen/heard interviews with him. Can you imagine winning an argument with William Friedkin? He's going to win. Personally, I saw TE at at this year's TCM Film Fest and thought it looked great. But even the same transfer screened on an OLED will look less "filmic" than it would in a theater. As others have said, this is hardly French Connection revisionism, really just an attempt to make things a dot more vivid and its fine for The Exorcist. It's lurid. If anything I agree w the poster that said that 4k isn't kind to the Max von Sydow aging effects. I've noticed more webbing on the foreheads of actors for their wigs/hairpieces than ever before because of transfers being a little too resolving.