If good player data can be used to improve the AI (currently, about the worst in the business), I am all for it.
Offline racing is next to pointless in GT for the top tier drivers (top 30% I'd guess, but hard to know what true % it is), and consequently it raises the stakes on how well PD structure and police online. The jury seems to be out on that, so far!
But competent, highly skilled AI is currently saving PC2's bacon on PS4. Obviously, with a PS4 you can only play PS4 players in PC2 (as I just found out, so maybe not so obviously!), you can't even see all 3 platforms' leaderboards in TT. But their AI can be set to 'alien' whereas GTS's can barely be set to 'noob'!. So I still find the game hugely enjoyable when I can't find a room I like online because I can't race the PC and XBox players (nor they with each other).
But fail to find a good online room in GTS, you might as well turn it off. That can't be good for the game.
I don't personally care if it takes AI cars able to exceed player physics. I just want a slider I can set to 'better than me' or even just 'as good as me', not currently 'worse than a noob'! I honestly don't think I've seen an improvement in Gran Turismo's overall pace since I started playing on GT5Prologue. That's TEN YEARS of stagnation.
While the gist of the article seems to hint at a possible B-Spec again, the data and AI improvements can't help but improve the player's opponent AI, I would expect. And that would be Gran Turismo's best improvement in ten years...