I will probably speak for nothing but i want to add a last word
i allowed myself to suggest all of this because that is based on developed mechanics or almost. Using an engine to build or dig/mine can be see like industries with dynamic start or end point/engine that can be manipulated or remotely managed by player.
With in addition changing instant create/remove behaviour by shape, material and tool capacity based action time.
Players could start with a package : basic building engine, basic mining engine, small container, and a transporter (with fuel) to move all of this. Then go and improve.
However
Imo there is also an interest for pvp. I don't know how it will be implemented but i think there is a risk that battles seem like fortnite. Building a wall or diging tunel to escape an opponent by simply switching hand tool. Thought this may be prevented by replacing instant create/remove mechanics. Or by arbitrary disabling tools during battle. (edit : i forget that create cannot work because of the need of modul)
I m curious to see how it will look like.
ps : lets speculate little more.
In place of disabling edit/write in an area, access can be managed by disabling/enabling engines if a player use these in a wrong place or on wrong structur, maybe with penalities. And pirates with their pirate industries could build their own illegal engines which could not be disabled. Of course possession or use of illegal engine should be detected and punished by the law. (maybe this can work in the hand tool case too)