When Whirlwind guard deflects projectiles, the projectiles should do waay more damage PvE wise. So far, I've only been able to kill a Scorpio turret while deflecting its lead barrage at its face so far, poor thing. I think it doesn't do much damage because incoming enemy damage in PvE is meant for guardians, not other PvE enemies. That's why an Acolyte 1v1ing a Dreg takes ages. Either making deflected projectiles do more damage OR consuming projectiles for super energy would be better.