I love being a GLA DD but there is no reason not to have a shield as of right now regardless of your role... The description of a GLA says that some marry sword and board while others just focus on their sword hand. I for one am somebody that willl run around with no shield for the look but in battle i know i would be gimping myself. My solution to this is that SE should do one of two things...
1. Give a buff for not using a shield
2. allow us to dual wield swords(even if that becomes like a trait we can get from the guild)