People are missing the point here. Since the F-35 cannot outrun or outmaneuver any likely adversary in WVR, and is also outclassed in the weight and diversity of its air-to-air weaponry, knowing what is behind you is not useful, but merely depressing.
And having seen a version of the magic EODAS in action I can confirm that it detects birds and clouds very well. Civvy jets half a mile away, not so much.