If you are using VR, the idea is for everything to be at a 1:1 scale. If you feel cramped, it is because many of the cockpits were cramped. Many games do have a slider for world scale that allows you to adjust the view size to your preferences. I haven't looked for any way to do this in AH because playing at any other scale than 1:1 defeats the purpose of VR for me.
A very large conventional monitor with TrackIR would be better for not feeling cramped: set the FOV to your heart's content. Hopefully, AH has or will have a setting that allows you to get what you want.