I dig the idea of a post-apocalyptic world that is barren. It gives an empire building game a clean start.
But in this post apocalyptic world the mood is oddly cheerful. Adventurous upbeat music is playing. There are cute little inns scattered about the map with happy people in them, with enough gold in their pockets to send you off to do menial tasks like killing rats. This is a generic fantasy setting and not the gloomy post-apocalyptic Mad Max world I envisioned. I'd like to see more refugee camps and makeshift forts and less pretty buildings.
My second pet peeve is the over the top micromanagement. This includes the RPG stats for Sovereigns, the decimal level up increments to said stats and the tedious city building. I think a feat based sovereign build would be more than sufficient. E.g. picking feats like Combat training, Strong and Hardy to make your Sovereign a powerful warrior. Or Arcane Scholar, Fire Mastery and Powerful to make a caster who burns things down in lots of creative ways but is vulnerable in melee. Feat of Pathfinding instead of putting points into Movement, picking Charismatic instead of having a charisma score etc..
As far as city building goes, I find it tedious to build all these numerous food producing things and housing. Having to actually place them on the map is just overkill and serves no purpose that I can see. The squares also make the cities look blocky and I think looking good is more important than getting to decide where your 7th garden is built exactly. Food production and Housing are basic needs for every city that should probably be abstracted. And I think a couple of upgrades for buildings is generally better than having 3 or more different buildings for the same resource.
For me at least the fun is about designing units, researching spells, using them in tactical battles and waging global magical war. In the beginning its fun to explore and fight with your Sovereign. But I find myself spending most of my time on the city grid, placing down more gardens and houses and checking population caps and food production numbers. It's a little boring.