Horse Archers are back in 1.4

[Miracle]

Do they fire to the sides or do they have to be facing the enemy?

They have to be facing the enemy, i.e. the enemy must be within the red boundaries.

Now that multiple rows can fire and that Light Dragoons have better shooting stats than Dragoons, what's the use of Dragoons? The Dragoon's fire-by-rank ability doesn't outweigh the need to dismount, Lights have better stamina, and they cost about the same. The only things Dragoons have going for them are better availability and the useless diamond formation.

Also, irregular cavalry such as Deli Horsemen are still unable to both shoot and reload while moving. You will still have to shoot-and-charge manually.