Fallen Enchantress ...
Tactical battles -> looking good
AI -> looking good (give the AI better, and more, units to choose from
)
Faction Differentiation -> lets wait on the next Beta
Things to learn from Civ IV: Each city was an investment ... had to wait a bit before it paid itself in gold.
In FE each new city is an immediate gain ... not sure this should be the case.
-> Way I see it, new cities should cost at least 1 gold per season in maintenance. Your first city starts with a tax-free production of 2 gold, all other cities have an initial maintenance of 1.5 gold. Yet NO EARLY BUILDINGS should have a gold cost in maintenance. So once those new cities start building some buldings, they will be worth the price. (But as Sean says, these no maintenance/ useful buildings should cost more LABOR, so that you have to choose between buildings and units more effectively ... whereas currently there is no choice, as the buildings build relatively quickly, and those with a maintenance are almost never worth building).
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Things to avoid from Civ IV: Each city could basically become the same (blech!)
-> Medieval Total War had cities vs Castles ... and currently FE has city level up choices, but they are not real choices at the moment.
I think City level up Choices should be between HIGH PRODUCTION/HIGH DEFENSE and HIGH SCIENCE/HIGH GROWTH.
while there can be multiple branching paths for City level ups ... there should be a distinct Citadel Path vs Metropolis Path ... possibly vs Mage Tower path???
Citadel path makes units cheaper, makes the city defend better (better wall options, more and better militia), and deals with the Warfare tech path.
The Metropolis path deals with GROWTH, and can branch off into Gold, Science, or Diplomatic Capital. (easiest way to get level 5 cities)
The Wizard's Tower path can give extra mana income, and can build better mages (higher intelligence/spell power)
Can choose which type at ... level 2 ... of a city. And then from there on out, whichever of the three you picked, you get a VERY different set of choices for levels 3, 4, and 5.