I had good EMS but either way the mass relays get destroyed. It has been known since ME1 I believe that the force resulting from the destruction of any mass relay would be the power of a supernova.
A purposeful and controlled detonation does not alway result in the same as a uncontrolled. Destabalising a mass effect field of that magnitude in this line of fiction destroys a system, yes.
But a purposeful energy wave to say "Wipe out all synthetic life" instead of a destructive force to kill all, I can dig that.
Sometimes I wonder how people are unable to think of these things.
It's gone beyond stupid now, people are picking at things which have legit reasons just because the rest of the ending was a complete failure.
It had good points, but some people are so ignorant to some of them because of the ending.