No such luck here unfortunately. I have done a complete removal of all OpenXR related tooling and reinstalled and have the same issue. MSFS kicks into OpenXR instantly with no problems... which was exactly how well DCS was working for me prior to the new global install option
I have now tried completely removing OpenXR and reinstalling, completely removing DCS and reinstalling, replacing the local openvr_api.dll instead of the global installer option. In all cases DCS simply starts in flat screen mode as though my headset were not even connected.
The instant I switch back to SteamVR it works perfectly again