So, I want to take the first part as a HUGE WELL DONE for deciding to commit to the ending. It was sorely needed for a long time and really helps to cement the point that this is a very, very difficult fight against creatures of immense power. It was built up well across multiple episodes, and the reactions of dread and despair from the community highlight how successful the decision was! However, I have a few queries about how the Dragon/Magic story actually works now, if we assume that this is the situation:
So on a fundamental level, knowing what we know about Kralkatorrik's strive for 'unlimited power', releasing lots of Magic into the world isn't necessarily a bad thing. However, releasing lots of Magic into the world whilst the Dragons are alive is a bad thing. The reason why there are huge explosions when the Dragons die off is arguably because there's so much Magic in one place, but you could mitigate that by removing each Dragon at different times, as we've been doing. To link this to Abaddon, as others will inevitably go to that next:
To conclude and bring it all 'full circle': Does this mean that as the Dragons have sentient motives of power and greed, that they're actually the true villains of Tyria? They're trying to maintain their own levels of power, pretending to be forces of balance. With more Magic, they have more power, and they're afraid to lose it.
And with that, Aurene died because she was a threat to Kralkatorrik's plan to maintain power. [Dun, dun, duuuuuun.]