Make the Radar (deco) have a purpose.

Quite simple really make the radar actually be used as a radar to create remote radar stations to detect enemy movements. You split this up into tiers aswell T1 could only show movement every 30 seconds then t3 could either be every 5 seconds or real-time & even labeling if its airborne enemy or ground based.

This is how factorio does it maybe something similar or take some influence from






These could be powered by making...

Make the Radar (deco) have a purpose.