After going back and reading up on lore about ECM, assuming Sarna.net is valid, I see only three ways to make this lore applicable:
1. One ECM Mech per lance or star max.
2. ECM no longer stacks.
3. Mechs not inside the bubble cannot be protected by the bubble being between them and the enemy mechs.
The lore for Sarna's info is fairly accurate. The problem is it's the size of the maps and ability to stack make it so easy to deny a large portion of the battlefield with this feature.
Therefore limit the ability to have it in match to a max of three. ECM is supposed to be expensive and fairly rare. Right now it's relatively cheap and present in just about every match in multiples. This shouldn't be the case. Factions and Merc Corps would not pile more than 3 ECM mechs in a company beause of it's rarity and lone wolves would be freakishly rare with it. ECM mechs would be spread out and tactical, not like raisins in cereals that promise multiple raisins in every bite. We easily can limit this and it would slow down connection times a little just like 3/3/3/3 did. But it is just as important as not having 7 assault mechs or 7 assault-lights needed to be stopped.
Now, ending stacking ECM deals out a TON of problems right there. Tag could function normally, so could BAP. Heck, so could a lot of targeting. AFAIK it doesn't stack in TT either so this would be in line.
Lastly, a mech outside the ECM bubble cannot be protected by the ECM bubble even if the bubble is between them and the enemy. This ends the screening effect I've seen for mechs obviously too far away to be covered by the ECM and yet gets all the benefits unless a mech has a clear view.
As a side note, I think that Tag should be completely immune from ECM to be honest because it is a visual targeting method based on reflected light painting. When I took this concern to the devs in the past, they had explained to me the ECM scrambles the targeting computer... then even direct fire weapons should be affected and the HUD should be knocked out too for all mechs as a base targeting hud unbolstered by a TAG is weaker. So unless we're going to allow ECM to scramble TAG, we need it to shut down the HUD on all mechs, and not just affect LRM mechs in this fashion.
Those are about as reasoned points I can think of to deal with the problem of OP ECM and yet remain true to the lore of ECM and what PGI has created.
Edited by Kjudoon, 12 September 2014 - 11:28 PM.