As we all know the Plaza takes a long time to load. It looks like this is due to the code loading most of it in one go including the v detailed Casino, Posidon etc. Things you cannot see at the start at all. Not everything is however. Some shops load when you get near them.
So how about expanding this for the whole Plaza?
Instead of loading 'everything' at the start load the transit station and maybe main square. As someone appoaches a place, start loading that (like some of the shops).