Ok tested this with a friend playing the Assault Zones.
The whole concept is cool.

However as of now we felt that artillery was next to useless due to their high cost, low rate of fire and low aoe damage.

Grenadiers are very overpowered as their grenades deal a lot of damage in a large area and explode upon hit. So if a player buys a grenadier squad they can easily clear waves of infantry by just rushing up to them and throwing the nades. Perhaps increase the timer and not make them explode on hit? Maybe slow their movement speed so they cant rush into the enemy?

Infantry were really bad at hitting stuff. I know they were bad at hitting stuff, but maybe improve the accurity for some weapons as right now they can't hit for ♥♥♥♥ other than being next to each other.

The 2v2 Paris map has water that cannot be crossed by the horses, had to move the artillery over the water, the horse refused to cross it.

Keep it up!