I think the loader can be a fantastic addition. Your prototype doesn't appear to require power, which the loader -should-. If it seems to be overpowered, you could further balance it by having it require a robot-delivered resource such as filled oil barrels.

Or since it is clearly a complex machine ...

In another post I suggested moving the player out of the way when placing a building. That would improve one part of the experience, but there is more room for improvement.

It's also quite common when placing buildings to get that error tone because the location is just out of reach. It would ...

The natural tendency is to operate in the center of the screen. So I run over to a location to place buildings and without even thinking about it I move so that that location is in the center of my screen...which of course is where the player is. So I encounter that error tone a lot.

It certainly ...

When I click to place a building that would occupy the space where the player is standing, the game should move the player to the nearest unobstructed space and allow the building to be placed.

This might be confusing or disorienting for some so perhaps it should be optional, but not being able to ...

I would like to see 1x1, 2x2 and 3x3 platforms that can be placed in water. When placed in water, the platform is level with the ground and can be walked, driven and built upon just like normal ground.

The small, 1x1 platforms can be made of wood. The 2x2 are made of iron plates and pipes. The 3x3 ...