I think the textures and models are ok. We know that AH displays everything in a 18 miles radius and that is a main feature of the game, along with being the major ressource hog. I'm no 3D engine expert but it seems like Aces high doesn't have many level of rendering details depending on the distance of the object displayed. Trees are still displayed the exact same whatever the distance is, planes change from detailed models to cubes abruptly, ground cutter don't go further than a few metres distance...
In the other bigger games you can see the level of detail changing smoothly as you approach an object or get separation from it, which is not really the case in here.
I perceive Aces high as a very powerful tool, but a blunt one.