I have recently updated this mod and version 1.3 is now available for download. Perhaps most importantly, I ran my textures through DDSOpt and dropped the resolution on my normal maps where most appropriate.
I also now have four resolutions available including 512x512, 1K, 2K and massive 4K version. These are now conveniently packaged in 3 separate archives, labelled Performance, Standard and Extreme.
I really can't effectively test the higher quality textures on my relatively under-powered gaming rig at all. So, if a tester would like to independently verify both the quality and graphical impact of these new textures and update the wiki as appropriate, I would really appreciate it.
Also, if anyone has any additional hints on how to further improve the optimization, I'm all ears. :)