I tried to beat the mission 2 times, but I couldn't do it. I won't say anything about combat because I don't understand it, but I also don't like these types of games so my feedback has little use.
The only thing I'd mention is confusion when commanding units. I don't understand how to make them attack. It seems like units can shoot while standing still or moving, but what cause the units to shoot? I have no idea.
Unit visibility - my recon vehicle was getting close to an enemy tank but it kept appearing and disappearing without any obvious reason why. The terrain was clear, without any trees.
The visuals are very nice and readable. Position of units, different terrain types it's all clear to see and understand. The aesthetic is a bit weird though, the shading + UI style made me feel like I'm playing city skylines and not a war game.