Ironically, small ballistics have never been good for light mechs in this game. AC2's have been used more by Jagermechs and Victors than any light mech. The AC2 and its clan variants are rather heavy, and their damage is not worth the risk associated with continuous fire. However, continuous fire is not a problem in itself. After all, light mechs with medium and small lasers also rely on continuous fire.
Look at all the Inner Sphere mechs that have ballistic hardpoints, which you would never see rocking an AC2.
Locust, Spider, Firestarter, Raven, Cicada, Blackjack, Vindicator.*
And the Clan mechs?
Kit Fox, Adder, Ice Ferret, Nova.
The Ice Ferret, for example, has a ballistic arm with 1 hardpoint, with only 9 tons of free space. Put an MG on it, you've wasted an arm. Put an CAC5 on it, you've spent 7 tons and only have 2 tons for ammo and backup weapons. It's pointless. The Adder has a similar problem.
The Huginn works great with the MGs and SRMs, but what if you want some variation and try an AC2? You'll get smashed. It basically only has a single viable build (you get to choose between SRM4 and SRM6, yay!) and that's it. I know a lot of people have tried 2 CUAC2's on the Kit Fox. Sadly no longer possible due to the fixed jump jets, but even when it was possible, it was a lot of noise with no damage.
I'm not sure what a solution would be, beyond just saying "GIEF ALL TEH QUIRKS!" but one idea would be to make them too hot for boating, yet still capable of doing enough damage that a single AC2 is worth carrying. Heat isn't really a big problem for a light mech with 10-12 DHS and a single AC2, because it rarely has enough tonnage for a lot of extra weapons.
But I'd love to see a game where my Huginn can jumpsnipe with AC2s, my Ice Ferret can actually do damage with an CLB2X, my Kit Fox can snipe with CAC2's and my Adder can tear people up with a continuous stream of CUAC2 fire
TL;DR: Let small mechs have small ballistics other than MGs, plx
FAQ - Since a few points are brought up several times in this thread.
Q: What about rifles, MG racks, light ACs, light gauss rifles and other weapons from TT?
A: Those would be interesting, but the CAC2, CUAC2, CLB2X and AC2 still need to be looked at.
Q: What about improving MGs?
A: Same as above. It's cool, but the CAC2, CUAC2, CLB2X and AC2 still need to be looked at.
* Actually not entirely accurate. I use an AC2 on my Ember, and it's a lot of fun! 2 cool 4 meta
Edited by Nicolai Kabrinsky, 06 November 2014 - 01:51 PM.