Didn't see this.
The reason I said what Mordin claims is being "artful" is this... (and I don't think Bioware just dropped the ball and directly contradicted themselves).
He keeps saying fertility rates: to paraphrase, "Oh, we didn't kill anyone, we just altered fertility rates."
Statistical "fertility rates" only account for live births. The genophage doesn't prevent krogan fertilization, it causes birth defects in most krogan offspring, making them non-viable at birth. Before the genophage, certainly, some small percentage of krogan would have been developed those defects, say x%; after the intervention, something like 99% of krogan young are non-viable.
So yeah, the genophage kills 99-x% of all krogan offspring.
With Urdnot Wrex's strategy going forward, there's going to be a large pile of dead krogan infants outside his centralized female camp, and this is just something they have to press through in order to try to survive as a species at all.
I suppose it's up to the player to determine whether or not it was neccessary; I'm just showing why it's evil, and why on playthroughs where I'm mostly just roleplaying myself, why my Shep argues that the Turians and Salarians responsible were unforgivably wrong.