Have you tried to lower your OC on the CPU. When I go at or above 5Ghz everything except DCS runs great. Lowering it to 4,8 Ghz actually increased my performance by a fair margin. DCS is really picky about overclocks.
For reference, I run at pixel density 1.8 and msaa 2x (shadows flat, vis range medium and the VR mod) at a locked 45 fps in the hornet (GPU usage about 90%). Motion smoothing in steamVR disabled, otherwise the fps would drop to the mid 30's now and then.
Every bit of text is fairly good readable (with some effort here and there, leaning a bit in). The immersion when landing on the carrier is incredible, so easy to find the landing spot in VR with the ability to see depth and getting a feeling for the height. Never ever I'm going back to 2D.
Edit: I have the VIVE lens mod installed. This has made a HUGE difference in clarity. Bigger than any software setting I can think of.