Let's face it, she was overmatched even at the height of her character arc. Going back and reading between the lines, we see she is not much more than a kid herself. Her middleaged status might have given her the appearance of experience and sophistication when compared to a pack of backcountry hicks, but with characters like the Forsaken, and Romanda and Cadsuane and other old farts running around, what is the difference between Moiraine and her charges in age on a scale of multiple centuries? Hardly noticable. If an Aes Sedai lives 300 years, figure that means a year to a normal person is 5 years of an Aes Sedai's life. Moiraine's 20 years of Aes Sedai experience is roughly four years of experience at a normal person's profession. She was no more experienced at Aes Sedai-being than Perrin was at blacksmithing or Nynaeve at Wisdoming! And what are her accomplishments next to the new main Aes Sedai characters? She found a guy the moment the Pattern decided it was time for his debut, which IMO, strongly suggests she could have spent the interim on a beach somewhere, because she or someone equally qualified would have stumbled over Rand in the nick of time. Yeah, that's not so impressive next to what the others have done, while holding down multiple jobs.

Moiraine was a con artist whose best skill was appearing to be in control to a bunch of people who didn't know better. When she was in charge, there was a horror element to the series, because the good guys were perpetually on the run, fearing discovery and wary of the Darkfriends that might be lurking to seize them in the next shadow. About the time Rand decided to blow her off and go do stuff on his own, all of a sudden the good guys started sitting pretty, rocketing up the ladders of worldly power and aquiring new skills at every turn. Moiraine's abilities at tactical planning and anti-Shadow strategies are on the same level of rationality and planning as Kevin Costner's in Field of Dreams - do something wildly counterintuitive on a supernatural hunch and wait for whoever is running the metaphysical aspects of the world to drop things in her lap. Her plans and operations all amounted to some variation of "Run" or "Hide." Moiraine's day is past, and whatever key part she has to play will be the result of other people's reactions to her, or enabled by some new information or ability gained by her sojourn in Finnland.