mLife status means nothing when it comes to upgrades, except maybe a room with a Strip view. If you have a host then ask if they can assist you with an upgrade. If not, ask if there are any upgrades at check-in. With those rates, I'd probably go with Man. Bay as well.
How do rates at NY-NY look? Depending on the price and room type, I'd go with that property instead even though the quality of the room is lower.