Apart from Citadel (which is probably my favorite DLC in the whole series), Mass Effect 3's DLC is pretty shit. Maybe it's just because I'm playing through all these games in order, one after another, but I'm really fucking sick of killing Cerebus operatives. That's all the DLC are. Killing wave after wave after wave after wave of the same 3 enemy types of Cerebus operatives. It's really fucking boring.
You are not killing cerberus operatives in any of Me3 dlcs? Or are you in omega perhaps? I remember fighting some new type of robots and reapers there.
There are new robots, but they don't do anything new. They just have a new skin and have slightly more HP than normal robots. They will also sometimes randomly throw up a shield, but it lasts like 2 seconds and is pointless. There is a new reaper enemy, but they also don't do anything interesting. They just attack melle and have barriers. However, Cerebus took over Omega, so you are fighting the 3 Cerebus enemy types for 95% of the DLC, and it's really, really, fucking long. 3 massive levels of semi-industrial boredom.
Leviathan is a little better, as it's interspersed with some puzzle solving, but the enemies there are a mix of cerebus and reapers. Leviathan does have that interesting fight where you have to guard the probe while it repairs as Banshees appear, but that's really the only interesting fight in the DLC.