Yeah, likely a CPU bottleneck. I'm looking into using some custom ini tweaks using reddit etc to try and squeeze more performance and doing other minor things like forcing PhysX on the GPU instead of CPU in the NVidia control panel.
But yeah, this has been the 'heaviest' game I have played, also based on that screen, my laptop is matching the X1X except for TRAM (High instead of Highest) and native res (150% of 1080p, which I think is around 1440p, and X1X does 1600p or something IIRC, but I'm also getting more consistent and higher frame rate.
edit: What's the simplest in-game usage UI I can do without adding extra load ? The game has a built in performance tracker too but it only tracks FPS, System RAM usage and VRAM usage. The VRAM usage from the Texture Settings in the game is FUCKED. On High takes around 3.3~ GB and uses 56% approx but the Highest maxes out the entire 6GB card and according to DF it's only usable for 12GB GPU's like 1080 Ti's.
edit 2: Apparently the same guy who practically fixed Nier Automata on PC also put out a performance enhancing mod for FFXV titled "Special K" mod. I'll give that a look too.