Decent speed. Decent range. Less risky than ML's. Chain fire the LL's w/AC5 and it'll be a while before you overheat. Not the strongest alpha, but consistent damage at a safer range. AMS will keep you in the fight longer.
Why didn't you cluster the 3 LLas into the Right Torso (or at least two of them)? It'd also be pretty trivial to drop a DHS in order to move the AC/5 ammo into the LT and protect it with CASE, then up your arm and leg armor. On the other hand, if anyone has an XL360 engine, you can use that and add a DHS and .5 tons of armor.