Do you have a source for that Kunos rumour?
Nowadays I spend most of my time on iRacing, but for a good chunk ACC was my main sim. Loved to pop in in the occasional Aris stream, used to hang around on their Discord a lot (still do, but not daily as before) and even their forums.
All I heard was that Kunos had no interest in the F1 license mainly for the unwillingness of F1 teams to disclose data for the devs to work on.
Aris always talk with pride about how long it took to foster a close relationship with Pirelli, manufacturers, and private SRO teams so that they could get to the point of getting real performance parameters for their GT3 and GT4 lineup, and even getting to take cars from privateers to track themselves. The last time I caught Aris answering a similar question from a viewer in one of his lives last year he said something along these lines if I remember correctly.
There's a reason so much of ACC real data is encrypted in the game files – from aero maps to ICE ignition times, from chassis flex to turbo boost, from caster angles to weight distribution.
In the meantime, you can basically edit performance parameters for Codemasters' F1 games on Notepad.
Liberty Media does not want a F1 sim from Codemasters and EA. They want a profitable, widely available, widely accessible franchise to exploit their brand.
When you follow people in the sim business closely, like Aristotelis Vasilakos from ACC or Nim Cross and David Tucker from iRacing, you get a sense that they have nothing but respect for what Codemasters has accomplished in reproducing the feel of driving a F1 car with the little data they from F1 teams and Pirelli.
Which is obviously not to say that F1 is a good title; the franchise is clearly not in a good spot right now. Just that people in the simracing industry gives Codies a thumbs up considering how much of a videogame it is.