Submarine Titans remade with Starcraft 2 Thread

Am I in the right place?

An old RTS game, which still has some fans left:

Theoretically, it could be re-made into SC2 using its game editor.

The reason I'm here is to kindly ask you if it's possible:
-Can SC2 have 5 "layers" (I think it can have at least 3 (air, ground, burrowed))
-Can units shoot projectiles in 3D? (they can in 2D for sure (balls, things like mirana's arrow from dota 2, etc)). By that I mean, for example, if a unit from the bottom layer can shoot towards a unit from an upper layer (at a greater height) with a projectile that doesn't track the target? (like shooting a bullet from a gun)
-Can we have units change layers? (like having the submarines change depth)

Thank you for your time and patience, and Have a Nice day!