Looks like it’s something with the PG streaming servers on the Microsoft side. I’ve had issues with PG looking horrible the past week or so in areas where it normally looks great. I surmise it’s related to the server issues people have been repeatedly reporting since last week. Microsoft have said they’re investigating, but nothing seems to actually have been done about it so far.
Las Vegas, when the PG is loaded correctly, actually looks ■■■■ good normally.
Vegas PG normally looks great for me. If you want to fly there you have to get the Fly Tampa KLAS, possibly the best airport in the game as it comes with lots of scenery in the city. Looks great in daytime and at night is one of the very best MSFS experiences IMO.
Although not as severe, I taxied through a swale at OHare (KORD) a couple days ago. I couldn’t say where it is on the ORD grounds because it was dark and I was directed along a long circuitous route to parking.