Why did they nerf grenadiers in DE so much? Grenadiers were already underperforming for their cost even before DE.

Nerfs to grenadiers in DE that I spotted so far:

• reduced ranged resistance from 50% to 40%
• increased rate of fire for siege attack from 3s to 4s
• decreased attack multiplier against cavalry from 0.5x to 0.3x
• decreased siege attack gain from Incendiary Grenades technology from +30% to +15%
• Socket Bayonet no longer improves grenadier melee attack
• Engineering School HC card no longer decreases training time of grenadiers
• something else I didn't spot?

Why so much nerf for a unit that was already shit for its price even before the Definitive edition? If anything it should get buffed, not nerfed. And an explosion of a grenade under the feet of infantry soldier deals only 16 damage, barely scratching him?