Considering how they only killed of unimportant characters for 2 full expansions now ... they got some stuff to catch up on.
A adventuring story no matter how cool w/o risk becomes unbelievable and boring.

You cant tell us like 4-6 years ago that Yshtola is sucking on her own life force to keep up and not do anything with it.
You cant have Ryne be pierced by Hades for 0 consequence
You cant have Thancred go about 500% beyond his limit in that fight and have him been ok 5 min later after a fade out
You cant have Gosetsu and that lady drop into a river collapsed under a building and survive
You cant have Zenos be ok after DIEING no matter how weird your plot device is
You cant instantly bring back ghara with a random plot device after "killing" him, also lets not mention he was shot after innocence died.

Thats just the ones i remember right now ...

Should all of them have died? No ... but dear god if you save EVERYONE ... it becomes boring.
Cept for Ghara i hope he dies by falling down a flight of stairs, that character just needs to go in a non glorious way.

So yea i hope we get some deaths ... because its about time. SE is just worried if they kill Yshtola their creepy doll and other merch wont sell ...