A lot of people forget this. Information is half the battle. The RWR on the Gazelle is better than the one in the MiG-21, and has already saved my life several times by allowing me to evade Su-27s and the like. In a helicopter, let alone a mach 1.6 fighter.
No, it won't be as good as a Su-27 or F-15, but it is not supposed to be. It's place will be fighting MiG-21s. But it will do better versus more modern fighters than the MiG-21 does.