I think the road mechanics needs some more love. Roads through swamps and deserts should give some penality movement. Pioners building roads for all factions? I need roads without having to use one specific faction, or convert a hero in a useless Governor, and try to level him untill, with some luck, the roadbuilding traits appears. Last game, I growed a POTG untill level 15 and the trait didn't appear.
The outpost:The upgrades takes a lot of production. It would be great it displayed between the available cities in the ZoC , and attach production to the selected. Switching resource development and upgrades between some of the different in the cities in the ZoC of the outpost sounds so good...
Improvements in information in the UI when leveling up champs. I'd like to see more stats, like accuracy, spell mastery and maybe critical damage too when leveling up, and how they may be modified.
I'd like to use ships some day too. Different kind of ships? Fish boats and faction food mechanics, suposing the fish survived to the clash? Naval techs in Civic, Warfare and Magic Trees?