My ideas of vip benefits are discounts on select items, and extra emotes.
As for oasis, the following could be added:
Beach Volleyball
Frisbee Throw
Lifesavers (Can be used in the water...)/the big pool floats you see at water parks
Boats in general would be nice.
If they could remove the rocks and make the water clearer, then people would go there to loot.
The gfx needs to be changed pronto.