Hmm I think I want one thing you could change in game would be is that you upgrade your adventurer party lvl, sending them out they earn exp and you earn xp to send them on better missions that doesn't get them killed.
Other is tavern would have food and supplies to sell, on side to give them away is kind like if it were caliber like missionary or someone who lost his things. Not just drinks...upgrades are harder to even on casual game level.