It would be nice if some things were a given in level up, while some things were a choice.

For example, with the Sovereign, offspring, and champions, base stats like to-hit, hitpoints, and moves should be increased incrementally on each level up. You then get an option to increase other things like STR, INT, etc.

since people have brought up heroes, aren't heroes supposed to gain feats as they level or did that not happen ?

I have no idea about what KingHobbit meant by "heroes," but I definitely want to see some sort of non-combat experience for champion units with administrative abilities. That might look like "doing nothing" to a combat focused player, but to turtlers and other less aggression-centered players it would look like a perfectly reasonable corollary to battle champions gaining power by winning fights.

sticking a farmer in a city should lvl him up.. or admin. or other similar.

would be even nicer if there's a choice of making them even better in those fields.

yes that's right, and MOM also had a life spell to give units max xp when you made them, and the final "unit" type building in the warfare line gave units maxp xp as well - the spell just saved you time and money at the cost of mana per turn (only had a small upkeep though).

So no one knows anything about the feats for heroes ? guess they nixed it then or planned it for a later expansion.