These systems, when used by TT "standards", by this I mean 2XLRM15, 2XLRM20, 1XLRM20, 2xLRM10, 1xLRM10 (mediums anyone?), etc, are balanced.
It's when a mech can fire 50-60 LRMs or more at once that they become a problem.
It's when a mech can fire 18-30 SRMs at once that they are a problem.
So, don't blame the game imbalance on the weapons, blame it on your precious mech customization and the fact that PGI let you boat anything.
If you nerf weapon systems, you will hurt more those guys who want to use balanced builds than the boaters.
edit: For new readers, there are about 2-3 pages where we suggest a new way the hardpoint system could work that would still permit customization and to some extent boating, but would limit abuse like the 6 PPC stalker and splatcat.
Edited by Sybreed, 10 March 2013 - 12:30 PM.