The buildings and units are nice. There are two categories of units - ground troops and air forces. Some units get upgraded in specialized buildings, but they also gather EXPs and levels in combat. I liked the possibility of having units of the same class, but with different capabilities. This feature will increase the number of possible strategies.
Units are highly versatile.
You will be able to control more than twenty of them with different skills and characteristics. It just wouldn't be a true fantasy game without the magic. The guys in Phantagram took that quite literally, and introduced three spell-casting units on each side. The mages have about ten different spells like teleport, speed-boot, concealing, or gathering Mana. Sorceresses feature some offensive spells like fireball, meteor strike etc.