There is no reason to feel squishy/get 1 shot before NMD 60+.
Are you…
Using Aspect of Disobedience?
Have points in Protection?
Running at least 3 defensive skills (to proc protection)?
Primarily defensive stats on your Chest, Pants, and Legs?
If you have all 4 of those, you should be fine.
I tried Rogue, its actually pretty nice. The apms are about equal to Sorcs, but they rely on less defensive buttons and more on armor/dodge than a Sorc. I would say give it a try.