Came to the same conclusion as the others in this post.
Wanted to create a smart Mall, and got stuck at the point where i wanted to allocate the amount of crafters, since it makes no sense to allocate the same amount for T3 Modules/T1 Belts, based on the amount, there needs to be a way to get the ...

Fix for this has already been suggested, so a quick tldr/bump:
1.) Make Shift+Place Blueprint add landfill underneath everything in water.
2.) Enable Placing Ghosts on top of Landfill Ghosts.
3.) Make a difference between Tile and Terrain, so you can blueprint path AND landfill.

When using BP there are different scenarios when placing on Land:
1.) Only Building: Works as expected. (Placed with a single use)
2.) Only Path: Works as expected. (Placed with a single use)
3.) Building + Path: Works as expected. (Both placed with a single use)
So far so good, but when you try to ...