Inspect the Talisman of Balance, Lady Alvane doesn't even hesitate when calling it April's and is generally baffled at how it go there, even though Saga probably fulfilled the second part of April's prophecies. Inspecting April's picture also feels like Lady Alvane is going out of her way to separate April from herself, or just reduce her to some vivid memories, also the picture of April she drew.
Before Book 5 i was convinced that Saga is the reborn April, but not anymore. Now it looks like they just have a "mysterious" connection ( probably something to do with the Kin ) and Saga carries some of April's memories. Nothing more.
Little Saga drew a picture of "Brian and the shadow inside him" which April had no clue about. Where did that knowledge come from? Is Saga also a reborn Brian or carries a part of his soul? So...Saga having all those memories of April's life=She's the reborn April, i don't buy it anymore.
Briefly, i thought she might be the new White ( when you examine the purplish painting of April, where the Mother and the egg was, Saga says it's the place of her "ancestry" ), but this doesn't make sense either because: when you examine the White on the wall ( which, suspiciously, looks like a piece of the mural that was in the Enclave. Did Saga loot the place? ) she says something like "maybe i'll meet her again" and her parents seem to be not Kin but: Magnus seems like like a normal person, maybe from Stark and Etta, based on a memento examination, i guess she's from a place/world? called Midgard.
About the epilogue, it was pretty hilarious that Saga/L.A. made sure to not let Crow be seen by April ( which, in itself makes sense ), but it was perfectly normal to have pictures of April on the walls and the talisman of the Balance ( which April also had with her when she visited ) displayed on full view.
*Also, i can't shake the feeling that in TLJ, L.A. was really supposed to be April herself ( not a reborn version of her or a different person ) and that changed afterwards.