Just downloaded the demo and got through the most basic tutorial mission. It’s definitely not Armored Core. It’s much more mobile, you can fly freely as much as you want, but feels to me that you are slightly faster on ground, which might be important when needing to dodge enemy fire. Also I doubt that customization don’t go to the depths of Armored Core.
On it’s own it feels fine. Movement in the air feels sluggish if not boosting, but that might be the point. But I have high hopes, so far it seems just like the kind of mecha game I’ve been wanting.