I feel like I have a better grasp of what RangerPhenom is advocating for, but I'm not sure it's necessary. Granted, I'm not engaging in combat the way most people are - my combat toons are 95% for farming mats. I will eventually need to run heroics so I can unlock the 8th character slot and get jewelry sets for my other two combat farmers, but instances/PVP/other ground content isn't where the game is for me. My game is in crafting and space.
My Commando-main, wearing a block suit with only the hand-sampling jewelry set, is quite tanky. I can, for example, aggro the entire Spider Cult cave on the way down to the Starmap objective there and tank it fine. It doesn't matter how many, I typically just go until one of them manage to snare me, drop secure position and kill the group - rinse and repeat.
But what I'm doing isn't what most others are doing, so I'm going to abstain on this idea.