Moiraine's entire life was spent behind the scenes, She has gambled with entire countries and many lives, including her own. She worked with no acknowledgment or reward, and never expected any of either. She found Rand and the others, protected them, and guided them. She became a central figure in their lives - someone they trusted, loved, and valued. Moiraine took out Lanfear. Moiraine discovered the Amyrlin. Moiraine's return was not only a banner for all, she is an expert on the prophecies and politics. She was wholly responsible for the Dragon's Peace actually working, bolstered the Amyrlin's resolve when it was most needed, and helped fight against the Dark One himself. Moiraine was, through the vast majority of the series, a bond between the main characters from Emond's Field- a wholly unifying force. She gave Nynaeve Lan, and exerted influence in countless ways even while trapped. And because of her return, the Last Battle was won. Anyone who thinks her return was unimportant, unnecessary, or lackluster needs to read AMoL again.