But Saga IS April.
It's just that April isn't Saga.
I know, I know -- and I know that we have a TLJ precedent for quasi-reincarnation (the White Kin), but I really don't like it. It seems way too convoluted to me, and interpreting Saga's Interludes as simple flashbacks from April's past seems much more straightforward (much in the same way that it's the simplest, most satisfying explanation to me that Lady Alvane is an older April).
Anyway, I hope I'm not coming off as defensive. I've got strong feelings on this, but will be happy to be proved wrong, if that's what happens.