Balmora seemed unnecessarily hard as a Juggernaut. I blame most of it on confusion and lack of polish by the developers. I kept feeling that I was missing something big with the talent trees. I wanted to tank and right off the start there are talents that boost abilites that I don't have. Nor do you get them until WAY later like puting a point to help obliterate at level 10, or reduceing the rage cost of backhand at 2nd teir but backhand isn't available until the 5th tier.
Some mobs on Balmora were buggy. Up in the north west part of the planet where the toxic swamps are, there were some strong mobs that could stack DOT's up to 8 times as soon as you started the fight. I always died about 8 seconds into any fight with those guys.
However Tattoine is where things changed. I was able to solo almost everything except some of the heroic-4 daily quests near the end, and when I landed on Alderaan, I am immortal it feels like. I am just mowing through things and I attribute it to finally getting abilities and buying good mods with the commendations. Always upgrade that hilt as soon as you can.
Learn to use your cool downs. Between Enduring pain, Invincible, Saber Ward, Blade Barricade, Call force, the shield from force scream, stimpack and a medpack, relics, I can take down groups of elites at my level now with Quinn healing.