Messages

Make soldiers throwing grenades auto-pin themselves so they don't get their eyeballs shredded with fragments.

Also make an option to make your soldiers take cover more frequently/ at player command, and, if possible, add an option that allows the player to set how much a pawn can be shot at before he ducks into cover.

Critical hits produce different effects depending on the source of the attack: blunt weapons will stun the opponent, sharp weapons bypass all enemy armor and animals cause knockdown.

Shouldn't it be the other way around?
In melee, blunt weapons are considered anti-armor weapons (impact shock), while slashing weapons cause nasty bleeding injuries.
Slashing weapons don't ignore heavy armor - they are TERRIBLE against it. Piercing is somewhat more effective, but not much (it doesn't cause as nasty wounds though)

I don't think critical hits with slashing weapons are meant to cut through armor, rather that you manage to hit a weakspot, i.e. where there is no armor, hence bypassing all of it.

If you manage to bypass a legendary set of armour I'd be very surprised. Maces should be the real anti-armour weapon, as they were in RL, and cutting weapons should not have this magical property of cutting through layers upon layers of armour specifically made to be cut resistant! Blunt weapons would literally be there for flavour, rather than actual effectiveness.