What if rines could upgrade optics to an infrared filter and flash light...
Currently no counter to cloak except active scanning, but what if rines with infra red had A. Better vision. And B. a infrared flashlight that would show cloaked things it's shown on.
Cloak still effective because limited infra red light in both range and diameter of beam, or give it some cons to limit use when aliens army heavily depending on cloak, ie blinding fellow rines if you shine in there eyes and they have infrared filters on or something
Ideal result walking through an empty hallway when you de cloak half an onos... Oops!