I think they could beautifully write in Leia’s death to serve as a tribute to Carrie Fisher and an emotional sendoff for the fans for both the character of Leia and Carrie Fisher.
Don’t know how much Star Wars could benefit of playing with the fourth wall that way. Kilo being a Darth Vader fan that is shown in his intimacy speaking to a mask almost tore it down.
I hope they let Leia be Leia, and give the character a logical conclussion to its arc, whatever they decided it to be; and let us grieve Carrie in the real world where she belongs.