I just hate feeling so squishy. I know the class, I know how to use the cooldowns, but I can't kill the people the ship we go to after Taris. I skipped the last part of Taris to get Pierce early and finish the class part because I hate the sodding planet. But, I get my butt handed to me by mobs the SAME level.
I respec'd to Annihilation many times to get past bumps like these, but I don't like the spec. Marauder just needs to have better survivability. I really, REALLY want to play it, but it feels like shaman in WoW. I have to play to a higher skill level just to be on par with other classes. Even then, I still die because I didn't have enough crits.
I want to play a pure melee dps (not a stealthy one), but it looks like I'll have to wait for a patch to see how Marauders change before I even attempt at finishing mine.
In short: it's worth it if you can pop all your CDs, spec right, know your rotations, and have a lot of luck. Otherwise, I would say to wait. And I HATE saying that. I love the class and the story, but I am getting a headache from the frustration of dying all the time and having to respec only to die again.