FYI I use a workaround for point 1, pop-in, by creating a ramdisk of 4,5GB at Windows boot, and setting a Rolling cache of 4GB on it , R:\Temp, R is the default letter for the ImDisk tool I used. More information here, really easy to set : RollingCache revisited, essential now with the aggressive culling - #13 by SvenZ
It’s a temp solution until devs fix it. Pop-in is greatly reduced, nearly invisible.
And just change a little your conclusion as it’s machine dependent : I have a big benefit with SU5 optimization on CPU and GPU side as I’m now able to raise all my VR settings including Render Scale from 70 to 80%, Clouds at ultra, etc. and still keep my 45fps locked ASW OFF
Saying that, I agree will all the rest of your post 
