Mini Map size, it doesn't need to scale the same as the default client but twice as big is almost a must. It might be nice to be able to move it it as well. In many ways Salem is an adventure game and the default client makes me feel boxed in. Being able to move the map I think would help make the player feel more in control.
The reseting menu drives me nuts. The problem isn't laziness it's that some structures are hard to place and if I don't throw the structure into the hotbar I need to click through like 10 times to place it. More for the stove.
The digging tool.
The equipment bar at the top left of the screen. This is mostly for the ability to drop a canoe without opening the equpiment menu.