Marauders damage has always been kind of weak compared to LNC and ARC, which is fine.
LNC always had a slightly faster attack, but now with Auto Attack Marauders damage has really gone to hell.
With a Gladiator using a Sword for roughly 75% of the damage you deal, but half the delay, theres a problem.
Lancers deal more damage per hit, with faster hits. That's a broken balance right there, usually a balance has more damage in exchange for slower attacks, but lancer has faster attacks for higher damage.
A one handed weapon being somewhat similar in damage to a two-hander, for half the delay, is also a problem.
I think using two-handed weapons needs to provide a larger benefit to damage, like an extra 25% over what it's dealing now. The attack delays are fine but the damage doesn't match the delays. Be honest, it really doesn't. By no means does Marauder suck, it still makes an excellent tank, while Lancer doesn't, but ... come on ... they are using extremely large axes and causing damage in the same ballpark as a tiny sword.
Perhaps getting a larger damage boost while in Steadfast would help too, or even an attack delay reduction. (Stand still for 6 seconds, get a light haste and maybe 10-25% increased damage as long as you don't move, it doesn't step on lancers toes but keeps MRDs damage in line with what the class tries to come off as).