Sayne: It's not just the gold filter. The Director's Cut version borked a bunch of textures and lighting effects as well.
Berzerk2002: Just download the GFX mod and restore a good amount of that stuff.
DXHRDC-GFX Highly recommend this plugin, since you can toggle just the lighting fixes without the gold tint if you never liked that part of the original. There is a pretty indepth write-up on this page if you want to know more about what was changed:
https://cookieplmonster.github.io/2020/04/26/dxhr-dc-gold-filter/
On another note I found that you can cycle between exclusive full-screen, windowed and borderless-windowed screen modes using "Alt-Enter". Primarily I always search out this option since I have colour callibrated my display and wish to preserve those gamma-curves in game, but borderless makes it much easier to switch between tasks if you have more than one display.
As to stutter, I do find there is some initial "hitching" that happens on loading a game, it is kind of like it is still loading assets after you are ready to move around, so I'm wondering if that might be part of the cause...after 30 seconds or so, it seems to come right, but I wouldn't be surprised to see more of that hitching on bigger levels.
Possibly not helpful, but if you are having stuttering FPS issues (rather than the "hitching" described above), have you tried switching to Borderless-Windowed mode as opposed to exclusive full-screen? I know it sounds kind of unintuitive, but I noticed that with the more recent Deus Ex: Mankind Divided, I get more FPS stutter in exclusive full-screen mode as opposed to borderless-windowed.