These two things can be combined, by ripping off the balance tactics from the building system. There too, there is this rift between different playstyles, so redundancy is needed. And to accommodate for it, you either can design building templates yourself, or you can use will-do prefab building templates which are already in the game.
Something similar could happen with combat as well: You get the ability to design formations templates yourself in the game, or, for those who just want to send out a party and watch things work out, you can just plomp down a will-do prefab formation template. Then you add the tactical stuff like pikes have more reach, to make formations useful.