Sounds like something I should try. I am fiddling with settings already, but not this particular combination.I'm sorry if this came up already because I just very quickly skimmed the thread, but in regards to jagged stuff and far away objects being unable to make out.
There is a big, BIG improvement to far away object clarity by setting HMD to 2.0 and SS to 0.5. This will result in no load change on your system resources compared to leaving them both at native resolution (1.0 for both), and it will look the same for close up objects, but distant object will be much smoother.
From there turn up SS as high as you can with your particular system, while leaving HMD at 2.0.