Pc2 as seen through the eyes of an AC fanboy: (Pre-TLDR: I'm not hating it)
I haven't touched online or used the AI; all thoughts in this wall of text are based on solo hotlapping:
My numero uno overall initial impression:
Grip. For. Days.
So much grip, especially rear end grip. Even in a thunderstorm while sliding around, there is still grip; you have to drive like a complete tool in order to spin a car in all but the rarest situations. There are definitely 'sim things' happening under the hood, but overall it feels like it permanently has the easy button pushed.
To get things started, I am using the RAW ffb with volume set to 60 with my T300. I push the wheel, it pushes back, so I guess the ffb works. The wheel goes limp while hydroplaning, which is good, and it also goes limp while 'drifting' (if you can call the sliding around you can get away with 'drifting') which isn't so good. Overall it feels a bit generic and 'meh' IMO, but it gets the job done. Might look into the Jack Spade stuff just to say I tried, but not really expecting anything mind blowing here. But even with my basic settings the ffb isn't horrible, or terrible, or unusable or anything drastic like that. It's kinda like a Jeep; utilitarian, no flash and bling, but gets the job done.
I have all three assists (abs, tcs, SC) turned completely off (more on that in a bit) and so far haven't touched anything in the setup pages other than manually swapping tires every now and then.
Physics:
You guys claiming this game to be some kind of 'new level' of realistic physics....C'mon......really??
There is far too much grip in almost every situation. And in most cases when the grip finally does give way, it does so in a way that there is no chance what so ever of getting it back. (which isn't always a bad thing, other than the ffb simply plays dead which leads to an even more lifeless feeling while waiting for the car to stop)
In AC I often find myself laughing a little bit because of a sweet save that I made or because I knew that I had gotten away with something that could have easily went the other way and spun me out.
In pc2 I often find myself laughing a little bit because of how much I am getting away with while knowing that if I drove any kinds of close to the same IRL it would result in a busted ass.
Also regarding physics:
What's up with being able to use paddles or H-pattern with any car? And using the clutch is completely and totally optional in all H pattern situations. (yes, autoclutch is turned off)
Having the car stall out and be a pain in the butt to re-fire is awesome! Huge props give for including this feature. Love being able to drive out the garage stall and down pit road; more props for SMS for including that.
ABS brakes don't seem to be needed IMO. You get the occasional lockup (and lifeless ffb that goes with it) but for the most part brakes work exceptionally well in pc2. (likely due to the whole super grip thing)
Graphics:
The benchmark. Even on high/medium settings using my (rapidly becoming ancient tech) 2500k/GTX 1060 the game looks amazing. Well, amazing when using night and/or rain. Bright and clear weather scenarios vary from looking really nice to looking simply 'meh'. But I don't see myself driving in those conditions too often, I have AC for that.
Daytona Road Course at night in the rain is epic to behold. I wish that the physics matched the visuals, but other than hydroplaning through puddles the grip levels/driving dynamics don't really change that much; at least not in the majority of cars that I have driven so far.
Let's wrap this up, didn't intent to reach prc levels of word count here.
When I fire up AC I end up fully immersed before I so much as leave pit road. I am no longer sitting in my sim-racing uniform in front of my tv with a toy wheel in my hand. I am in that car at that track and I drive exactly as I would in real life doing the same things that I have done/observed in my lifetime of experiences. Driving the cars the way I would in real life results in the car reacting/behaving the way that I would expect it to 99% of the time. The 'muh immersion' factor is set about as high as the 'simulation value'.
While driving pc2 the 'muh immersion' factor is much, much lower. I never just lose myself in the driving; I am always aware that I am playing a (quite fun) driving game. The physics allow you to feel like a driving God, but guess what, feeling like a driving God can be good fun.