I think this game could improve in several areas.
1 - Renaming slaves.
2 - No level cap.
3 - Side quests where you can choose rewards (ex: gold, experience, weapon/armor, crafting materials since there is a limited supply, additional stat or skill points).
4 - A coliseum where you go head to head in a random battle against enemies at your level (so experience earned can be equivalent to you level).
5 - Super hard bosses for a challenge ;)
Love the game and hope for more like this. :)