Question for those who played it, how bad was the AI rubber-banding? As bad as it was in Motorstorm, Horizon, etc? Better?
The AI in motorstorm was/is not "rubber-banded". Instead each AI opponent drives to within a set time (which is sometimes as ridiculous since you will see some unbelievable laptimes if the lead AI opponent, for example, gets held up quite often due to accidents/altercations).
The game is never "unfair" though since It basically encourages you to find the fastest/perfect line and route (master the track) for each vehicle and then you will win - just about always.
With DC's focus on challenges and lap times though i seriously doubt they'd be using the same kind of AI. If anything the AI will probably be extremely barebones and just there to fill the numbers