..now, don't get me wrong, that all sounds lovely, particularly because you can earn more than one part per event and how they seem to mostly affect "secondary stats", i.e. slipstream length, nitrous recharge etc..
..but I do hope they've taken notice of what Payback did and what made that a 🤬 of a 🤬 when it came to upgrading cars and included an actual alternative to having to win parts every time. The Crew 1 did it by unlocking a part for purchase for vehicles of a certain spec once you'd won it once with that spec. For instance, a Gold Tier 50 Exhaust with acceleration boost. Once you'd won that in a Perf Spec vehicle, you could go straight to the shop and buy Gold Tier 50 Exhausts with acceleration boost for all your Perf Spec needs.
If they do something in that vein, I would be completely fine with it. There's still the element of you-can-get-different-"perks"-by-winning-races and you would still need the money for buying them, but it (probably) wouldn't completely 🤬 over gameplay.