Defensive formation vs missile barrage?

[MeiguoJinjang]

I am asking about the underlying mechanics and not the animations.

non-Defensive formation: They will hold their shields angled high when targeted by missiles.

Defensive formation: They remain crouched behind their shields in front of them despite no contact and missiles.

Obviously, in the real world, you are more likely to get skewered by a parabolic projectile if you don't lift your shield. But in the Rome2/DEI world does this have an impact on missile hits and damage? BTW, I am using sub mods: Alternative Hoplite & Alternative Pike, and I am playing Rome and have not hit the first military reform yet.

Thanks.

PS: Latest DEI modules from Steam

[KAM 2150]

Animation and shield position has no impact on it, just missile block chance.
In formation they get bonus to block chance.

You can even make a naked guy with a dagger that blocks 100% of incoming missiles (bouncing of his fist).