1- Bear traps the player can carry around and then setup. It would be fun for hunting. (and just laying traps in general)
Currently I don't think players can carry bear traps only pick them up and move them around. It would be nice to carry them in your inventory.
2- Working fishing poles. I'v seen poles and i'v been disappointing from the start that we can't use them. This would be great!
Yes, I know there are fish hatcheries but you can only get small fries. This would be a good opportunity for the dev's to throw in some new aquatic wildlife as well.
3- Camping tents the player can setup. I know, you can just "wait" or go to a home but us role-players that like to spend time in the wilderness won't have any of that. Right now as it is, you have to find a camp site already setup which most likely already has inhabitants.
4- Lantern's the player can carry in one hand. (that actually require candles you can purchase) I'm not a mage, I don't use mage light. I'm a hunter.
5- Clothing dye. A new crafting table (much like alchemy/enchanting etc) can be introduced where players can use various plants collected to mix into dye's that can be used to change the color of clothing/armor.
6- Ability to build or at least own an Inn as a source of income.
7- Mountable Mammoths, If you can temporarily tame a dragon and ride it I see no reason not to be able to stampede through some enemies on one of these guys.
That's all I could think of. I know it's not likely to happen but it's what i'd like to see. A small Adventurer update would be pretty fun. :3