I agree that Yas Marina is a very exploitable circuit in Multiplayer; there are at least 3 known spots where people regularly cut corners.
As for its frequency however, you’d have to do a more controlled test as it could simply be a subconscious bias towards its appearance that makes you think it shows up too often.
I did a 100 race test in the B/600 Hopper a while back, and found that Sebring was far more prevalent:
