Her more magical part, the role of the Mother of a future that may still be, her Kinship and her importance not just to Stark and Arcadia but the whole of the Multiverse passed onto Saga. As did her destiny to both save the balance and ultimately destroy it. We assumed that the Veil of which Abnaxus spoke were the events in TLJ, but in Dreamfall Chapters he is still living in the Veil - in fact it's killing him. That might imply that the Veil is more connected with the To April incidental plot of the Undreaming, rather than the Balance.
Abnaxus said the Veil was created in Chaos, by Chaos. During their last meeting he says "the veil is upon us all". I think it's a no brainer that the Chaos in question is the Chaos Vortex. You also mentioned the Veil still affecting Abnaxus during DFC in the other thread. I don't understand where you got that from, and the veil killing him?
"I will have stayed behind too long, after my people leave one realm for another. This time is poison. It diminishes me..." ( poor Abnaxus fading to dust, probably the saddest thing in DFC for me). So, Abnaxus living disconnected from his people for a long time, made him sick and he started to fade.
* And by the way, is Abnaxus wearing the effing talisman of the Balance, or is it just a knock off?
So while they're related, Saga has the memories of April in the same way that The New White had the memories of the Old White, without them being the same creature. And April's true spirit, or self, continues to endure in some fashion, in some realm, for some final adventure.
I totally disagree. The NW doesn't simply have the memories of the OW. They're one and the same, the White Dragon, the Mother. When the OM dies, an identical looking creature hatches, the NM. But at the same time, the new creature, aka the White Dragon, aka the Mother is still the same as the previous one, because the Mother is eternal. To put it simply, i see it more like a snake changing skin.
Also, the White in DF is fully aware of her identinty and existence, she knows she's the White Dragon/Mother herself. She's not like: "well, i have these vague memories concerning a white dragon and i feel we have a sort of connection, but i can't quite put my finger on it".
So, i don't think it's the same thing with the Saga-April situation.
As for April's spirit/soul, isn't it supposed to be merged with Saga, for the reborn thing to work?