I agree 3BC needs some major love. The loot changes were nice but the XP rewards are really sub-par.
Restless Isles needs some love also, rarely ran and usually really long. Titan needs an EPIC...seriously...I love the quest, but I never see and groups anymore because of the gear vs. cap.
Ataraxia's Haven could use some love also...not much out there...and since it's L10 it's a hard leveling bump.
Really look at the L12-15 quests...those are really hard levels...the XP curve should help but revisiting the quest XP would go a long way to making it less of a grind.