The radars seems useless and the magnet module seems like a worse quantum attractor. The radars could have a secondary effect of increasing the abundance of the things they search for to make them worth considering.
Yeah the radars need some tweaking, they are pretty useless. I had them visually point in the direction of the next upgrade/portal charge, but had to cut it for bugs near release. I'll add them to the list.
Great idea re: having them adjust spawn frequency.