Yes, it is an excellent and very potent weapon.

Stuff like Plasma stealth is just fanboy speculation however.
Manuever in ANY flight phase to avoid SAMs? How would it even know SAMs are being shot at it?

I think it probably just do that randomly just like anti ship missiles in terminal phase , what confused me is the fact that they said it can make 20-30G maneuver, can make 90 degree turn at any phase while the missiles itself have very high mass and lack both TVC and big fin
multiple warhead and ECM may still possible due to the missiles size though