Lightweight scripted shields with power consumption for all turrets (configurable or researchable)
Mods introducing new content into the game.
New ways to deal with enemies, be it attack or defense.
When deconstructing turret wagons from the mod "Armored Train (Turret Wagons)", the shield entities ("entity-name.square-8") are left behind and block construction. Entering "ts refresh" in the console removed them.