Well, maybe. It's pretty well-balanced with the Gauss Rifle. The Clan ER PPC arguably really is the king of the battlefield, though it's not as munchtastic as weapons like Clan Large Pulse Lasers and cLRM-20s.
I had the feeling the LRMs in MW4 have been toned down damge wise in comparison to MW3, which sucks.
In MW3 a full barrage of 40 missiles crippled every mech ( heavy upwards ) and destroyed everything smaller then a Bushwacker.
Granted the heat generated makes you vulnerable for a moment, but it's worth it unless the enemy is close enough to paint a smiley on the back of your Mech.
The UAC and LBX weapons have also been toned down, but this applys to almost every weapon in MW4.
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In Solaris i used a Cougar ( 2 C ER LLas, 2 C LRM - or 2 C SRM ) in the light class, a Uziel ( 2 C ER PPC, 1 C SRM ) or an Ryoken ( Kai Allard Liao config

) in the medium class, a Thor ( 1 C UAC, 1 C ER PPC, 1 C SRM ) in the heavy and a Victor ( 1 C UAC 20, 2 C MPLas, 1 C SRM ) or a Daishi ( Prometheus config ) in the Assault class.