I feel the game would benefit from more "active" gameplay features being that a lot of the game is passive. Fishing is fairly active, until you get an abundance of nets/mealworms daily. Once you have the fishing merit badge, there's not much of a point in manual fishing. I would like to see something similar, that I can actively do in the game versus just waiting for cooldowns. I think adding a Hunting skill to the game would do just that. Hunting could involve several creatures such as deer, boar, turkey, etc. There could be various tools to use for adding benefits, such as animal calls (like duck calls), bows & arrows, crossbows, spears, traps, etc. Also, the drops from hunted creatures could somehow tie into meal cooking and/or stamina regen.
Im not exactly sure how it should be implemented, if it ever is, but that's just an idea I've had for a while now.