Saxophonist, on 21 January 2013 - 11:41 AM, said:
It was that way in canon. The 2X and 4X were prototypes, and not production models. They were total crap there and they are total crap here. The 3L was useful in TT, and it is useful here.
Actually, the 2x and 4x were field refits for the 1x, which carried a primitive EW equipment that combined the active probe and ECM in only a small radius. 2x went with a large laser and up-armour, while 4x went with jump jets, machine guns, and even more up-armour.
The 3L's big advantage lies in just how much lostech turned out to be useful for an idealised scout/support 'Mech - which is why the stock 3L has ECM, BAP, TAG, and Narc - take ALL the EW gear!