While I clearly have doubts about ACE going ultra hardcore. I hope that it will be better at some physics stuff and that will kick rF2 development a a bit to keep up.
What that could be ? First of all, actually simulating rain racing lines (vsicous hydroplaning) and puddles properly (dynamic hydroplaning). They will probably have the features, but will they have balls to make it fairly realistic....
AC always had an advantage of actually teaching people to use clutch. Which is just a pathetic joke that rF2 doesn't, I am sorry I am actually mad about it, it is just a game and who cares, I know I know... Another advantage is having tire pressures that can be too low, although in AC it is completely made up, rF2 being built on absolutely different standard would actually have to have actual reasons for that - tires collapsing and going all weird (I think they could just have ring and bristles going noodles mode with lots of resistance for rolling, also too low pressures should be putting on fatigue forces into tire carcass dangerous enough to break the tire, thats I suppose is rather complex problem to simulate....
Now if AC would do rain properly, it could be one more reasons to do it for rF2. Actually in ACC they had rain amazing right on start, they just didn't have rain racing lines at that point. I spent great deal of time and attention studying and learning about wet tracks driving, and ACC at start just simply did it. Later on - not anymore. Here is the reason - rain can only work well with correct way tires develop grip statically (not sliding) vs kinetically (sliding). In rain staying on "rails" mode is the thing, and slips are very pronounced as they are more severe, quicker and more twitchy, obviously it all depends a lot on speed, water depth, tire tread and tire pressures (idk if any sim yet simulated rain tire pressures properly). When a sim is getting a design, a paradigm, of tires that are no where near sharp enough, with static friction too little and sliding friction too good, that alone makes rain driving impossible to achieve being realistic, it is soapy then, lazy and safe in an annoying way that is zero fun, zero reward, no sense of going fast (it actually applies to dry dynamics too, but with way less annoying and negative effect to it).
If only people would start demanding good stuff for once.
Secretly I imagine, what if stuff could be modded in ACE to actually be hardcore simulation, in case vanilla would turn out to be a little bit detuned. But they would probably ban me from modding for it haha