I like it. Any chance you would tell us what the buildings do?
Something like this (I added some new ones too that popped into my head). I'll need to come up with some city growth improvements.
shark tank (i) - doubles sacrifice
mad lab (sw) - 2 free advances
dino danger (gw) - spawn dino unit
mech mayhem (gw) - spawn mech unit
world ransom (gw) - Treasury earns 5%
wardrobe (i) - culutre increase (2); Happy Faces (1)
training room (i) - Vet ground units
infirmary (i) - 2x city growth
recreation suite (i) - Less War Weariness
trophy room (sw) - More chance of leader
torture room (sw) - Less corruption
bunker (i) - 60 Land and 10 Bom def. bonus
monster pit (sw) - spawns monsters
containment cell (sw) - Happy Faces all cities
auto def system (i) - defensive naval & air cover
workshop (i) - production increase (2)
teleporter (i) - telepad
mainframe (i) - 50% Science bonus
comms centre (i) - Less corruption (waste)
command centre (sw) - Forbidden Palace
Sat System (sw) - Allow spying
WMD Programme (gw) - build nukes
Telemedic (sw) - Healing in enemy territory (req. teleporter & infirmary)
Forcefield (i) - Missile attack success down 75%