I agree with a lot of the other reviews on here, in the sense that the game needs more. The process to level up is slow, and it’s the only purpose of the game.
If you’re really struggling with ideas, here’s some:
Player houses (maybe make a new village just for the houses)
Daily gifts (for logging in)
More quests (MOAR QUESTS)
New places to explore, plus new NPCs
Easier ways to level up (maybe by playing mini games, or getting supplies for NPCs)
Animations for the character (wave, laugh, cry, etc. This would be a good way to bring life to your avatar)
Jobs (as a way to earn some extra money, or even items)
New classes, or as others have stated, subclasses to make the game more interesting. As an idea, maybe have each character have a special skill, maybe related to the elements. (i.e. fire mage, Wind archer) this could add more variety.
Maybe add some NPCs that could help the player fight, as an idea, maybe rent the service of a knight to help you fight, or ensure your safety when on a difficult mission.
Have an option to play in “survival mode”, where you can build, hunt for food, fish, and explore. Or have players buy plots of land that they can build on, and everyone can work to build a neighborhood (of sorts).
Now, doesn’t a game with all these features sound appealing?