Just had a go with the first Tuner event, I was saving it for last.
It's surprisingly okay.
Time Attack felt like a normal round of Qualifying with the option for restarting if so desired.
Drifting isn't as crappy as I thought it'd be. The car doesn't automatically spin out of control as easily as it does in the previous installments, and you seem to have more control overall. The scoring system is pretty neat, and the AI is decent enough, but not unfairly so. Not bad Codies, not bad at all.
After sampling all the disciplines I'm actually leaning to Endurance as the most difficult one yet, both in terms of qualifying and winning it. Ravenwest are massive cheaters in those events, even more so than the other disciplines. God knows what uber machines they're using, the gap between the 1st and the 2nd position (both usually held by their team) are so massive, once it crept up to 6 full seconds. God help you if you don't qualify in at least the 2nd spot, once they have the lead they turn up the "nitrous" and they're unreachable.
I've yet to beat them fair and square in any Endurance event, the only way to even have a chance is to cheese them at the corners, taking advantage of their overcautious AI.