I'm already done with those performance changes.
gfx st x are streaming commands and forceload is a Unity debug option that just makes streaming textures load, which would not help if a texture was slow because it is in system RAM.
Friday I actually disabled streaming when texture quality is less than Full, since both features are doing a similar reduction in textures and due to what seems to be a Unity bug were not working correctly with each other leading to blurrier streamed textures.
Testers found that some FPS drops were actually biome particles, so today I fixed that:
Fixed Particles in snow and desert cause major FPS drops (balanced sand, smoke and snow particle rates to a reduced max count of 150).
Changed "Water Particles" video quality option to "Particles", which now also decreases world particle count.