I feel like it'd be great if there was a way to create almost an "environment probe" or something over water, or the area you'd be standing in, that'd make it become "cheap". Cheap water being water without reflections, or any of that really resource intensive stuff. I think in scenes with distant water there's no need for the reflections and huge FPS drop.
I think It'd be really cool if there was a way to have inexpensive water in the distance at some point in LE's future.