ATG, I've no idea what you are on about as the GR4 has no BVR capability or indeed any reliable way to detect aircraft BVR. Stuff like JTIDS (coming), IRST (not coming), PD Radar/IFF interrogator (not coming), Distributed Aperture (not coming) would all add value for detecting other aircraft in peace and war. Terrain masking at high speed reduces the ability to see and avoid. Have you ever experienced 1000kts closure in less than perfect vis?
Adding a CWS may just stops us thwacking each other without a war - we just need to make sure it works and does not compromise anything or get in the way.