I am still surprised when people are bringing up Kurtz when it comes to ROTJ. He was fired and replaced by Kazanjian in the middle of ESB principal photography. He basically had nothing to do with ROTJ, let alone being aware of any details such as Kasdan’s and Ford’s suggestion to kill off Han.
Actually, I didn’t know this. Are you sure? I’ve seen BTS footage of Kurtz in the editing and/or scoring sessions, which I would assume would’ve post-production.
EDIT:
There…I had to go find it:
https://www.youtube.com/watch?v=Eyc82C3yc0s