So, since Patch 6 (or at least one of the hotfixes post it), I find that if a companion dies on the Nautiloid, it doesn't matter. For example, Shadowheart died on the Nautiloid (dead dead, not downed) and yet when the beach loaded, there is she, unconscious.
Why? I let her die on purpose (for RP reasons, I'm playing a cleric) and it doesn't matter. Is this a bug, or a new sort of ingenious move by Larian?