At the moment it's not balanced at all, or rather it's impossible to tell if it is balanced because of how it's used as opposed to how it was intended to be used.
Instead of giving a few mechs a specific and important role like it was supposed to do, what you get are 8 man ECM heavy teams running mostly ECM capable lights swarming over you using their ECM and Lag Shield to negate the vast majority of damage you can throw at them, while in PUG matches it's not much different only less coordinated.
Because before the latest patch the only effective weapon to use against Lights was streaks because of the glitchy hit boxes, now with ECM streaks are completely useless so you have to play "where's the hit box" and hope you can leg the little ******* before they kill you, which is like playing Russian Roulette with a Semi-Auto a full magazine and one already in the chamber.
So what am I saying, well, the combination of ECM and ****** net code ala moving hit boxes has made it pointless to play anything but an ECM capable light mech. Because really the only counter for ECM at the moment is another ECM and there are only so many ECM capable mechs available to select from. Don't even talk about TAG, it might be useful against the Atlas DC, but against the Lights it's useless, because by time your able to use it they're already on you.
So really, PGI needs to do one of two things fast, reinstate knock down until they can properly fix the net code or remove ECM until they properly fix the net code so that this game doesn't degenerate into an arms race for ECM capable Light Mechs.
Edited by KageRyuu, 04 December 2012 - 05:35 PM.