Out of all of the games I've made thus far, I think this one has the most potential for growth and expansion. 

The idea of switching characters is great but the fact that you have to die makes it gamey and cumbersome. Fangpower mentioned how it's kind of like Pokemon, which gave me the idea that damaging the opponent till they're weak and then possessing them would be a good idea going forward. Similar to how you capture weakened Pokemons. This could be done with the likes of The One Ring from Lord of the Rings.

The combat needs to change, I myself am not the biggest fan of Turn Based combat but, that's what our team decided on when first drafting the idea for this jam. I think the RPongG by Simco is a really cool idea for a battle system and with the swapping characters each side of the screen could swap based on who you are playing as/fighting against making it a unique and fun battle system.

The world is static. There is a lot of world but not much interaction with it, swapping to different characters should prompt different dialogue with other NPCs. In general needs more interactions to make the place feel lived in.

The Life Goals. The life goals are not displayed prominently enough for the players to see them at first, leading to a lot of confusion and aimlessness. I'm thinking in the future the game would have a Sims2 UI bar that shows the person's three life goals. Two would be supplementary and one would be their main objective.

Life Level, this is something that I didn't get to implement in the game but, the idea was that with each person that you complete the life goals for there would be an overall level. It could be tied to the ring, increasing stats so that no matter what character you play as you're still strong enough to deal with most enemies you encounter. with the end goal being letting the player either resolve the conflict between the humans and monsters or push it further into war.

Puzzles, this goes alongside the Life Goals and world being static, this game would improve greatly if it had some kind of lite puzzle element akin to that in 2D Zelda games. Only certain NPCs could access certain areas or perform action in the over world and you'd have to swap between them to overcome the obstacles.The only thing I'd have to avoid is the Donkey Kong 64 dilemma, where you have to walk back and switch to characters. Maybe once you've beaten one type of NPC you can get their passive powers.

Menus, the menus are fine for the most part but the game needs an over world menu where the player can check their stats, items and equipment.

I'm sure there's much more that could improve the game but these are the main ideas I can come up with at the moment.