They can probably use them for Healing, note that Tuon finds Healing to be very useful. From a military PoV, Healing will allow the wounded to get back into action in only a few days at most, compared to weeks or months for recupery. And Healing can also save the lives of soldiers who would die from what would be a fatal injury.

And then there's Travelling. Note Egwene's biggest concern was preventing the Seanchan from learning that at all costs, since they'd just be able to Travel right inside the WT at will. The Seanchan would definitely be able to use Travelling to their advantage. "Would" should probably be "will" since Elaida was stupid enough to get captured and she knows the weave.

Even the Oaths aren't a serious hindrance. All the Seanchan have to do is put former AS damane in harm's way where they can channel. I don't see them doing this with more valuable AS like Yellows who will be better at Healing, strong sisters who can make gateways well, or AS who have a broad set of skills that would be better use to teach other damane.



I'd say it's their fault for forgetting the weave for Flying, but in all fairness they probably wouldn't be able to use it properly while collared.