I'm also waiting for a multiplayer overhaul before I try again.
If I were to give it scores at the moment it gets 2 out ten for user friendliness, and 5 out of ten for net code. Unless the cars in front of you have single figure pings they just look wrong way too often imho. Other cars seem to have no physics at all, they corner impossibly, pointing outwards, crabbing around corners in a magical negative drift. Direction changes are the worst, the car changes direction of travel and the smoothing stuff takes about a minute longer to change the way the car is pointing. I should and in most other sims can have a good race with people that have pings around 50ms. That won't be the case with ac unless the sort that out.