I'm truly impressed, I for the most part agree how disconnected the Heroes integration and their role within the "4X" aspect of FE was. Also, it was a chore and really unbalanced that whomever found their Faction's random Champion first, could potentially recruit them. Huge gameplay imbalance, utterly and without unnecessary revulsion injected.
Not trying to brag, but I did wish I posted ideas of mine for confronting the Unrest Penalty system much much earlier when Frogboy first released a snippet of it. I think it's a potential system, but if not done right, will cripple the game.
What's worse than the Unrest Penalty hypothetically, and, Civ 5, is the City Capture system as it currently is. I haven't played FE for a while nor posted and read here, but its absurd. Cities need to require turns till they're completely destroyed, depending upon its growth level, and most importantly, Neutral monsters can NEVER Raze a city, only destroy a single Improvement per invasion and percentage of that victims treasury.
My biggest fear is as people already raised here, and that is capturing enemy cities. Its simple but a bit complicated, in that we need to make sure when an enemy city is captured, that it does NOT add to the conquerors Unrest Penalty.
The game needs Assimilation and Puppetry. An immediate capture of any foreign city should always be allowed to be placed in some status that prevents it from raising your Unrest Penalty, in return for not being "annexed into your Empire/Kingdom and subsequently wedded, but in return lose at least 50% of all its Output.
If Stardock blatantly adds captured cities to the UP, than the game is fucked till patch lol. I personally would prefer Civ 4's in that its Maintenance rather than Unrest, because game-wise its much more manageable as proven when it came to deciding to found another city, and/or creating Improvements in any settlement.
UP is much more streamlined, yet, dangerous if not appropriately handled.
I have all love for Stardock, and Derek because of having played Fall From Heaven and witnessing how awesome of a total conversion that was. Absolutely talented man, If I could, I'd force him to personally produce GalCiv3, GalCiv4, and all their expansions without doubt of failure.