Advantages? Putting head look aside (which obvious EDTracker can do for a fraction of the price), and ignoring the fact you lose access to your keyboard when in VR, what do you perceive as the advantages of VR for combat?
All necessary functions are available on my HOTAS and the look panels (this includes all panel/menu navigation). The only thing I use the keyboard for ever is typing in a system that I don't have bookmarked. The ability to visually track the direction and maneuvers of a target as you chase is a huge benefit in combat.
Personally, I have no issues reading text and the ability to look and lock a target is also very helpful in locking specific targets quickly.