Some thoughts:
It delivers what it promises, but for whatever reason I expected "more". Lots of stuff to do, but seems to lack depth in places.
An explanation of the stats and stuff would help. I'm kinda unsure on those things.
Not bad for $10 though. Enough different ways to play that it should keep me busy for a while.
I had once gotten the option to play as the Red Empire, I think. But it disappeared, and I could never get it back.
The player in several scenarios/factions is a small invader attacking a large Empire (or whatever is left of it). Hence the AI's reported win rate.
However, in most scenarios the Empire isn't very aggressive. In some it just sits there and gets gobbled up. Then the player tends to lose to another faction that just "grew quicker".
The custom win condition is fun, although I found 10000 Gold or 10000 Menace to be too much with the current development progress. Not enough options to build tall and wait, I think. Best option is probably just to spam whatever is the basic base for most factions until income = victory in ~10 turns, then hit that Next Turn button. Expansion is good, but some faction bases are hidden, so whatever you take you should be prepared to lose if you're just going to wait to win.
And frankly, I think on most maps the player is likely to win/lose before the resource fills up to the required level. The game has a sort of eat or be eaten feel to it.
What would be nice is diplomacy. Customizing what factions are allied with the player could be great fun and add variety. Maybe the Government accepts the player's cult. Maybe the Ratfolk and Goblins are content to divide the world between themselves. So on and so forth.