I'd be more excited to get a new Heishou Branch (Not Mao/Si) than I'd be to get Night Drifter or Daiyu honestly
Night Drifter doesn't seem to have any interesting mechanics playerside and doesn't look good,
Daiyu looks like a worse Zwei Ishmael that sacrificed being actually immortal to be somewhat immortal and inflict some more DPS

Do you really have to drop Magic Bullet for the optimal Burn/Tremor team? That's losing out on so much damage.