For all the talk about Hydaelyn, you actually don't interact directly after ARR. You spend much more time talking to a reborn dragon. The Ascians are eternally ticked off, sure, but SE has definitely said that that particular plotline will resolve in 6.0.

As for the Twelve, sometimes ancestral memories run deep, and have little or nothing to do with Hydaelyn.

As for duality, as long as there is day and night, people will create dualities. Nothing much you can do about it. Sometimes it's clear-cut. Sometimes it's as hazy as the smoke that rises from a wood fire.

In a Narrative Universe, there is always something to strive against, even when that something is ourselves.