So in your eyes the Ea made the right choice in self-terminating? Lets imagine the Ancients also discover the heat death of the universe, having already succeeded at "perfecting" Etheirys and completing their purpose. Would you say its only logical that they also self-terminate?
And Endwalker is all about what we do when faced with ends that cannot be forestalled.
So the question stands is it preferable to be the Ea and feel that the only option is oblivion, or the Sundered and perhaps through ignorance (and perhaps through something else) live to flourish and have fulfilling lives?As fragmented, imperfect beings. Yours is a neverending quest. A quest to find your purpose knowing your end is assured.
By this logic we can say nothing is lost in the destruction of the universe then, as all are doomed to unhappy endings anyway. This is of course Fandaniels position.
One doesn't have to deny entropy in order to believe fighting for tomorrow is worth it. One can accept its inevitably, and much like death to mortal beings, make use of the time we have to its fullest extent. The journey, not the destination, so to speak.
I don't plan on living that long either. But I do concern myself with those future lives because I also believe they should be fulfilling and good as possible. Which is why I would hope to ensure those lives don’t feel as if self termination before they need to is the better option.
We do have her factions quote asking for the Ancients to relinquish stewardship to those new beings. Given what we know about her goals, and her actions that followed that suggestion, I think it logical to conclude that this was a possibility for her. However, two major issues need to be resolved before this is a solution.
1. The Ancients would have to agree to let those beings live their own lives free of interference or control. In order for them to strike against Meteion they would need to develop their own outlooks, reasons and motivations for existing as mortals. Interfering would compromise this.
2. Efforts would have to be taken to separate mortals and the Ancients in order to prevent conflict. The Ancients held sway over the star for millenia. Watching mortals make mistakes and ruin things would be excruciating and given the Unsundereds reasons for hating the Sundered conflict is almost inevitable. Likewise, should mortals come to know the Ancients and their power, they may try to do the same thing they did to the dragons. I'm imagining Thordan 2.0.
I wouldn't be so quick to presume the writers aren't addressing this chance. This expansions Tales and the Myths of the Realm are still incomplete.