I would like less tedium. I just played a 6 hour game of elemental and found myself hitting next turn too often. Early game is too slow trying to build up cities, late game is a slot of pouring out units and slowly fighting your enemy back. More QOL functions like auto-equiping hero's with best market gear, assigning heroes to groups so they aren't useless late game (they just get 1 shotted by anything), better AI when using quick battle (if I overpower the enemy by a lot and I auto resolve, I lose a unit, but if I let it play and watch on auto, no damage... what gives?), and a tighter ui (even on newer hardware, it felt weirdly sluggish when it was my turn, lots of extra clicks).
The whole hero unit thing is awesome, it's just gets to be too much of a chore as the game drags on. I want a few more passive type heroes like the city admin. Also, make all heroes more tanky or remove death penalties, or at least tame them down (no penalty if the army wins and a small penalty if the army loses). It's already enough of a loss losing a hero army, let alone having a hero with a permanent de-buff who ALSO has to heal up.
1. More hero skill trees.
2. More QOL features like auto equip or auto level up armies (sooooo many clicks to upgrade a dozen troops by troop size, weapon AND armor... the damn window closes after EACH upgrade!!!!).
3. More city improvements (maybe parallel improvements with unit production so speed it up)