I don't know.

Elaida is a good example of "hell is paved with good intentions". In many ways, she was not very different from a Black. She didn't use the excuse of serving Shai'tan while serving her self interests, she rather pretended to be interested in the greater good, while almost all she did served her own interests, her grandeur, her power thirst, her frustation that the Red Ajah was kept from the top, her place in History etc.. Her redemption would need a multi-scene story arc to work, and I doubt Suffa would find easily the humility to realise her mistakes and do something to serve the greater good for real. Even Rand has faced a wall with them.

I'm not sure Elaida has much of a role left to play. AMOL was to be a single novel, and RJ was in resolution mode. Elaida's downfall was a lot more elaborate then most Forsaken's so far, and it happens not so very far from the original 2/3 mark.

Rj has not so far dwell much on his fallen villains. Theories on Elaida now may very well end up like theories on Sevanna, Masema, Galina, Suroth etc. Suffa's 'epilogue-like' last scene was suspiciously on the model of Galina's in KOD, and could even have been her final exit from the series.

My hunch is that unless RJ intended the Seanchan not to get Travelling, he would have been unlikely to stretch that story arc much close to the 2/3 mark in the book. It could well be that the next time we see the Empress, the Seanchan already have gotten the weave from their prisoners, and we move on to what they plan to do with it. We are (most likely) in the part of the story where things tend to accelerate in WOT books normally, at least for Tuon/Egwene/Rand.

A very small role for Elaida til the end would fit with Brandon's evasive answer about the outriggers, when asked if she would ever learn about her misinterpretations. This could have meant we won't see Elaida again, or not in a very significant way, unless the outriggers are written. This speaks for her remaining a damane or at least captive, in any way. It's extremely ironic that Suffa ended up like Bonwhin should have. Suffa is virtually the poster girl for why channellers's ambitions must be feared and kept under control.

She may have a significant part to play (and not necessarily for good - if anyone could finish to convince Fortuona that her views on channellers are justified, Suffa's wild claims about the Amyrlin/Tower might) or she may not have much of one. We'll see.

I'm not sure it is enough to set a trend, but it's funny that the Seanchan seems intended as the punishment for overambitious characters: Liandrin, Sevanna, now Suffa - in an indirect mode Valda/Asunawa have fallen to them too.