Thanks for the info but its really weird. Even if I shut steam down, and launch the non-steam version of DCS (I have both standalone and Steam versions installed), it will always launch SteamVR with it.
I tried removing SteamVR and see if I could launch the standalone games version of VR but it just starts the base game.
After doing some digging I did find out that its possible the resolution problem can either occur from either A. Your own resolution on your computer screen or B. Having 2 monitors (I have both 3840 x 2160 resolution and a second screen, so either could be the issue).
I will test more and update my findings