The Lancer has a smaller spread but a higher accuracy penalty for firing, meaning if you spray and pray you aren't going to hit as much as you would with the CSMG.
All those guns get to enjoy using their damage increasing mods while still having 65% armour ignore.
They're all better off using that setup than they would be with a 90% armour ignore. Even the CSMG would be, if it had an armour ignore mod that wasn't a barrel.
Go test the Lancer in a solo with the CSMG. Shoot a wall if you want. The CSMG will make a wider pattern. I just did this yesterday on a Human Soldier.
CSMG is most likely being compared in people's minds to the Hurricane, while Lancer is being compared to the Harrier. CSMG is more accurate than Hurricane, and Lancer is less accurate than Harrier, ipso facto CSMG is more accurate than Lancer. I feel into this trap until I looked at the stats and did a test yesterday.
Even if the penalty is worse per shot, it isn't working out much after the 1.5 ooc penalty is applied to both of the zoom penalties.
Also as to the last point of the quoted post and in response to mega, CSMG does a lot more armor DPS with Barrel and APIV than any other HVB setup, except possibly for Incendiary CheeseTM. Hence I compared with damage barrels and AP IV for each weapon. And more to the point, if you want to not run the damage barrel on CSMG for ammo priming, it isn't ideal given that the rate of fire is relatively high, which means less prime chance relative to nearly all those others to begin with. If you were running HVB for Warp Ammo, that will give you higher armor damage if primed, but that is also true for nearly everything else, even the pistols. It won't be true for the Eagle, but big deal The whole point is the Eagle can have similar armor DPS to the CSMG... which might tell you about how wonderful CSMG armor damage really is.
In reality, CSMG is an ok infinite ammo sidearm that punches above its weight for armor damage. That's it. If am talking primaries that weigh less than 1, I can get more health, shield, barrier, and armor damage from a bunch of weapons which include the Eagle and Hornet. Now if you want to like the CSMG just because it is fairly mild mannered recoil wise, that is fine. But it is absurd to comment that Lancer can't hit things out of melee range and the CSMG can.