Sensor grenades DO help teammates, to a certain extent. Sensor grenades still points at the enemy with a laser and has a sound cue, even with cold-blooded. Teammates can pick up on this if they are near enough to hear or see it, and it may even net them a kill rather than a death.
Did you not play search? Besides Sit Rep, Recon was by far the best perk in the game. It was game breaking if an entire team used it.
Removing them because they were abused it one mode is as asinine as the nerf they did to the M8 because people abused it with SF.
It's not like search isn't one of the most played game modes though.. It also wasn't just abused in one game mode. That one game mode just highlighted how cheap it was. It was also evident on Dome (any mode) or Face Off (any map/mode).
if activision were a physical entity, i'd wrap my hands around its neck and have an orgasm as i feel its pulse slow down" - mega boie715