if this is a game intended to be played only in third person like a 4X grand strategy those models are excessively detailed, the amount of tesselated versus textured surfaces are too much for how distant the camera would be. For example, would the player really need to see all those tris in the landing gear of a tiny aircraft, or those hundreds of vertices in that glock-ish model? from the games you listed as inspiration, a handgun barely distinguishable by the player could be done in ~20 vertices with clever texturing.
From your screenshots it looks like someone was toying with the idea of hexagonal prism tiling instead of cubic – that’s the modern way to go imo. Every newer grand strategy or turn-based graph combat game that I’ve played as of late has, to my memory, used hexagonal prisms. Just a more interesting look and I find it more immersive than how binary cubic tiles feel.
Again, with the distance of the players’ camera I may still not understand – making the “Unite” models an R15 rig may get quite costly in scale as compared to an R6 rig, when from so far away the player shouldn’t mind simpler modeling and animations.