Pros
ICD reduction
At 6s ICD, XM8 is one of the few AP grenadiers with this cooldown, which puts her leagues above the others, including M4 SOPMOD.
Buff cleansing
Her buff cleansing is a welcome addition when enemies specialized in buffing units have become common in late game.
AoE debuff
Her AoE debuff not only has the same targeting system as the AP nade, it also targets the next group of enemies if her nade happens to kill its target, which means that it’s quite unlikely to be wasted. Moreover, it debuffs, for 8 seconds, 25% Damage and 50% Accuracy, both very relevant starts to debuff. It can also stun enemies inside the AoE for 1.5s