What it HAS done, is forced people to change their approach to using them, tactics and on their mechs, hardware configs.
My Drop Group last night faced groups running 2-3 ECMs minimum, every single drop. We were running 2 ourselves, consistently. One in our Commando Scout, the other in our Atlas D-DC. Our Atlas was armed primarily with 3 ALRM 15 racks, an ECM, an ER Large Laser, and a TAG.
Our Commando had 3 Streak Packs and a TAG to go with it's ECM.
The other mechs fluctuated, with me playing in various Cataphracts and whatnot.
Guess which mech consistently laid at the most damage, EVERY SINGLE MATCH? The supposedly nerfed and useless LRM boat, regularly recording 900+ points of damage.
And it was done through simple teamwork, every mech covering the rest, and when an enemy ECM was in the way, our commando would go set his to "DIsrupt" and focus on said mech, while TAG-ing. Our Atlas also didn't find a hill to hide behind like so many LRM boats prefer but actively maintained a 350-450 meter separation so that he could use his own TAG, macro'd to always on, to lase targets and direct fire his LRMs.
TL;DR.... The point is nothing is OP or Broken with ECM. People just haven't taken the time to find the work arounds. Lack of tactics and adaptability, and laziness make new tech OP, not the tech itself.
***EDIT, also, if they "turtle" under multi-ECM umbrella, it means they lose their ability to maneuver very effectively. And LRMs can be dumb fired at a SPOT. Turtled mechs means little ability to shift and doge, and therefore are succeptible to siege barrages.
Edited by Bishop Steiner, 06 December 2012 - 06:03 AM.