[Suggestion] - Making trained units progress rather than become obsolete
Personally, I'd rather be able to keep a unit the entire game than have it go obsolete after a series of new technologies. The high level units that have been fighting with my Champion from very early on are eventually rotated out in place of fresh recuirts in favor of higher group size and sometimes nothing other than 2 additional movement points. I find myself hesitating to make trainable units until I can give them horses or if I'm nearing another "Group size". I have a couple suggestions/enhancements that would allow players to reinvest in thier units to keep them current. (in my percieved order of importance)
1) ability to upgrade a unit to have a mount. I think there are merits to either doing this as a button that applies to all units or as part of the unit design that it would be able to "use best available" somehow. This would be most important to imho because it when my champion has 4 movement, unmounted units are a big hinderence, and designing early game units that can upgrade thier armor isn't practical because they will run into encumberence problems.
2) Ability to upgrade group size (perhaps at an experience cost proportional to the increase in group size).
3) Accessories being "upgradeable" - This one is probably the most difficult and least significant, but I start with my mages who have the accesory for +1 fire damage. Then I discover the accessory for +3 fire damage. Just like a clear improvement in armor, there is no reason to chose the +1 over the +3, although you might go for both. Just being able to somehow give that nice new accessory you invested reasearch into on your existing mages would be nice.
My demanding enhancements aside...I'd just like to add that I'm very happy with this game. Even moreso, I'm excited by Stardocks approach to customer satisfaction. I add these requests (and make my first post ever) because I'm encouraged by how responsive they are to testing. Regardless, by offering this game free to those who bought the first, and showing such immense effort to make ammends, Stardock has earned my loyalty. I am very much considering buying a 2nd copy of this game to show my support!