TL;DR
Blueprints should also be able to deconstuct entities at specific locations, not only where new entities are being build.What and Why?
I have places a grid of roboports and electic poles across my entire base. I want to replace the eletric poles with substations. The substation require a different placement. They are not being built on top of the electric poles. You can see the placement in the image below.I wish that I could mark certain cells in the blueprint-grid with "remove entity". In the example below, it would be the specific grid-cells where you see the ghosts. That way I could just plop down the improved blueprint and it would spare me removing hundreds of electric poles by hand.
Using a deconstruction planner is not possible, because I have eletric poles all over my base and want to remove only these specific poles and these specific places.