You cant add a vehicle just for the aesthetics, it needs a unique purpose, such as being needed to build some of the bigger machines like the Manufacturer, or higher tech machines that use the S.A.M., or it could provide the different point of view that would allow for construction downwards.
Alternately it could provide something of a mass building option that allows you to build your foundation in LxW squares, where you can edit those numbers with the arrow keys up to a reasonable number...
Try to flesh out ideas for new features like this a bit more. The more work you do for the developement team, the easier it is for them to implement.
Edit: Similar to this idea would be those huge tower cranes used in vertical construction, it would be like a tall watchtower with an arm reaching out that your cockpit can move along to provide a top down perspective for construction on a large scale.