Age of Fracture: Your bog-standard Neutral Ending. You become Elden Lord and as far as I'm aware, the status quo remains unchanged. I'm going to assume for every ending that the Rune of Death was reattached to the Elden Ring when you fixed it, otherwise no endings other than Fia's acknowledge the whole "living forever and everyone is a mindless husk" problem, which is probably the biggest issue plaguing the Lands Between at present. Even then, it doesn't touch on any other issues such as the Omen, Trolls, Giants, and Dragons being persecuted against by the Golden Order, as well as the Deathblight (Those Who Live in Death isn't a natural state of being, change my mind) and Scarlet Rot (it's spreading slowly, but still spreading, give it enough time and the Lands Between will eventually be consumed by it. Also, giant Monster Dogs and Birds) problems.
Age of the Duskborn: Makes Those Who Live in Death apart of the natural cycle after dying, thus when anyone dies, they become an undead. The only issue this ending resolves is that Those Who Ling in Death are no longer being persecuted against by the Golden Order, and by proxy I'm going to give it the benefit of the doubt and assume that Omen, Trolls, Giants, and Dragons will become undead too when they die and thus won't suffer from persecution either. Unfortunately, this ending doesn't really address the Scarlet Rot, and becoming a seemingly mindless undead skeleton after you die doesn't seem very appealing.
Age of Order: In the words of Goldmask, the gods are at fault for causing suffering in the world by having human desires, when they should be above that, because they are gods. This tries to fix that problem by removing the ability for any god to alter the Elden Ring in any way, such as when Marika removed the Rune of Death. This doesn't really address the persecution problem, nor the Deathblight and Scarlet Rot problems either. Overall, this is a definitive improvement over the Fracture ending, and is probably the safest "Elden Lord' ending by far, with no sweeping radical changes to the people of the lands.
Blessing of Despair: Prevents the souls of every inhabitant from being returned to the Erdtree, due to assumedly every living being becoming cursed to become Omen, whose souls cannot return to the Erdtree because they are considered "defiled beings." This is the best take on this ending I could find, and it's not exactly a direct improvement from the Duskborn ending, but at least you don't become a skeleton when you die. If Morgott can get by and eventually become semi-accepted within the Golden Order, then normalizing Omen by making it the new standard, doesn't seem that bad of an idea on paper. Omen can't be persecuted against if the people doing the persecuting become Omen themselves. This doesn't seem to address the Deathblight and Scarlet Rot problems, though, and I'm unsure if Trolls, Giants, or Dragons can become Omen, even if they started growing horns, so that issue isn't solved either. Yet again, based on Morgott who seems to have his wits about him and is a pretty strong-willed guy, both in body and spirit, I'm going to lean on it being an improvement, since Omen seem much more capable than your standard human. Of course, this is just an assumption, we don't really know what "being an Omen" is really like. It could be better, or it could be worse.
Lord of the Frenzied Flame: Everything dies forever, the end. It technically solves every issue on our list, the Deathblight and Scarlet Rot are eradicated, Omen, Trolls, Giants, and Dragons are no longer being persecuted against because they and the people who persecuted them are now also eradicated. While it's true that all the evil in the world is gone, all the good is gone too, so it's no better an ending because it makes a whole new list of problems, such as life as we know it ceasing to exist, the Lands Between becoming a flaming and barren wasteland, and everything is really hot now. I'd say the new problems are worse than the old problems, so this ending gets a big yikes from me. It's a fine talking point for philosophy about how much suffering must be endured before one begins to think if death is a preferable alterative, but not really anything else. Of course, if you like being the bad guy and think everyone in the Lands Between should go suck a big one, this is the best ending.
Age of the Stars: Ranni replaces the Golden Order with a new Order of her own making, and then takes that Order, and you, with her into the deep cosmos for 1000 years, leaving the Lands Between without any leadership from any gods or lords, essentially left to their own devices. And just in case you missed this, the reason she makes a new Order at all is so that no other gods can try and interfere with the Lands Between while she's away, which includes the Greater Will. Unless this also stops the spreading of Scarlet Rot and Deathblight, I don't really see anything changing, this might be no better than the Fracture ending. And unless something is done about it, I don't see people changing their ways, suddenly stopping the persecution of Omen because it's no longer required of them to do so. This ending assumes too much that people are better off without the gods, and that the world will improve without gods interfering with their lives, but without considering that people are any less flawed than the gods that ruled over them. People are biased and ignorant, which can lead to them being unnecessarily cruel. Of course, there's also room for improvements because it leaves things so vague, but every ending is vague.
Don't know if my takes are fully correct, but these are my thoughts on each of the endings. Let me know if there are any definitive notes I may have missed.
