How can I fix this?

This shot was taken from the observation deck at Q1, the 78-storey "World's Tallest Residential Tower" in Surfers' Paradise.
It was about 1.00pm, a hazy day with plenty of salt spray around and I was shooting through glass. (They wouldn't let me throw a chair through the window to get a clearer view. What's with that?!)
Is it a lost cause? Is the image even worth trying to tweak?
Your advice would be very welcome.

It was about 1.00pm, a hazy day with plenty of salt spray around and I was shooting through glass. (They wouldn't let me throw a chair through the window to get a clearer view. What's with that?!)
Is it a lost cause? Is the image even worth trying to tweak?
Your advice would be very welcome.
