I think the hints to the future after the last battle are given to us in the fragments from the past. The descriptions of the “Age of Legends” tell us (generally) what will come. I infer that the “Hall of the Servants” was the most powerful channelers — male and female — working together. The great wonders they had during that Age were made by males and females together. The craftsman at the Black Tower seem to hint at this. 
 

Somehow, the male and female channelers will get together, but it certainly will not be at the White Tower. Cadsuane had spent decades avoiding the place. I don’t see her just shoehorning herself into the Tower life. My thought is that the White and Black Towers will become schools, training channelers who, when they graduate, will move on to some other place. Or other places. The Power will not be concentrated in those Towers, because it was not in the Age of Legends.  More of the population will be able to channel (with more men who have the ability able to live longer, now that they aren’t hunted or sickened), and more of the population in general will see channeling as a normal, beneficial part of life. That seems to be what happened leading to the Age of Legends, so it will come again. The seeds have been planted by the Dragon. 

As an aside, I think the terms of the Dragons Peace will shape the Aiel into what we saw in the visions of Rhuidean. It’s just a cycle. 

When Rand/Moridin lights his pipe at the end feels a lot like the way of Tel’aran’rhiod. In the way that Perrin attained “mastery” of that place, it seems that Rand attained mastery of the waking world once he fully understood the nature of the Pattern. He doesn’t need to channel. He just imagines, and it is.