PUBG had a similar discrepancy of Frame Rate being tied to RoF when I was heavily into it, they managed to alleviate the issue but there are loads of videos with tests and what happens regarding it.
All you have to do is play/see CoD Warzone/Black Ops in Cross Platform mode to see the inherent differences that higher Frames (PC) vs lower Frames (PS4/Pro +Xbone/S/X) can do.
There are other factors such as ping/ticket rate but getting killed behind walls, having bullets "ghost" through the target etc are all symptoms of differences in Frame Rate.
As someone else said, Linus did a great video regarding 240Hz using Shroud if I recall.
For those putting the whole "Frame Rate is tied to Rate of Fire?!" down to FDev's ability to code an FPS game, you should check it out. It's not so cut and dry, but mostly knowledge is power.
I'm unsure about the aim assist in Odyssey as I'm an M+K user (having a mostly FPS history this is my preferred method of input with exception to Cars/wheeled vehicles, they feel much better with a Controller), however I have used aim assist on Console versions of GTAV and BF/CoD.
GTAV uses a "snap to" method, where you can use the bumper buttons to swap target left and right and unleash fury (less realistic in regards to recoil etc). They also have the ability to use both 1st and 3rd person viewing which as it was primarily a 3rd person game, I favoured towards (despite being an FPS player), it just felt better for that game IMO.
PUBG did also, I'm hoping Oddysey has the ability to switch between 1st and 3rd person in the near future. This would be amazing when piloting Ships/Vehicles as well.
BF/CoD has an adjustable aim assist, mostly it works by you "feeling" it sort of slightly magnetise toward an enemy when they're within your reticle, and it's more of an assist where you still very much need to aim, lead/predict movement, control recoil etc.
Ultimately it depends if the goal is to make Oddysey a more competitive experience, I'd opt for the latter control method given ED's sim-type immersion.
If it's supposed to be a bit of fun (with en mass NPCs), then the GTAV type aim assist method would be better suited.