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.
If you put MG turrets in middle of nowhere -- they'll always show no power (but work well enough). I don't really have a good suggestion here. And not that it is too much of a problem, but would be good to look into approaching it.
hmm maybe using the shield disabler selection tool? then the icon would be super tiny maybe i have another idea