The consumer rift total resolution is actually 2160x1200, so not 4K, though it's 1080x1200 at each eye.
This has been the most widely misunderstood subject re the Oculus. Every time someone says "I wish it was 4k", I'm pretty sure a kitten dies (not that you said that). You can't compare an HMD resolution to a computer monitor's/TV's resolution. You actually can't compare resolutions between two different HMDs because the optics techniques vary widely between them.
Everything you wrote about motion sickness is correct. Resolution has nothing to do with motion sickness at all, and the latency issue was reportedly resolved with the crescent bay prototype (post-DK2, pre-consumer release version). Also notably, the head tracker, which was already substantially better than trackIR on the DK2, is complete redone allowing 360 degrees of movement.
Re: the Clickable cockpit issues, those were resolved long ago. I was able to manage just fine even with my DK2 over a year ago. I'm sure it'll improve.
Regarding lifting the unit to write things. Interesting. I'll have to see, because that sounds immersion breaking to me.
Also sounds like you misunderstood what I wrote about it needing to be tested here at the 476th. This isn't a trust thing. It's an experience thing. Most groups in the DCS world don't fly the way we do, so while all input is valuable, anyone who isn't operating the way we do can't really describe in detail what the "considerations" are. The way we use our internal website, share images, write our mission data cards, pre-brief, stream videos, etc. Almost all of us use iPads/tablets for the the data we carry into the pit. We know nothing of how everything around the sim and in the sim will perform. It's a much more complicated subject than "is the resolution high enough and does it not make me sick?".
A real evaluation for the 476th will have to be conducted by the 476th. I would imagine that's true of any virtual squadron with highly specific sim play, not just us
PS: I should also point out, I play other games... and even if I conclude the Rift doesn't cut it for DCS, I'm 100% sure I'll be playing other games with it. I loved my DK2!