DCS itself is currently the limiting factor with DK2.
Lackluster graphical optimization combined with no specific VR aides (like magnification to cope with tiny in cockpit text) mean that while still an amazing experience it isn't 100% usable.
Improvements to resolution only go so far with VR as when you increase it the horsepower to run it slowly becomes an issue. Slowly specific ways to mitigate this (e.g. Foveated rendering) are becoming more accessible via the SDK and Nvidia /AMD driver/game sdks but again, DCS history of adoption of these improvements doesn't instill much confidence.
Regardless, I'll be throughing every penny I have at making DCS work, frigging love it in the DK2 as it stands, regardless of all the issues