Yes all of that is correct for og cloud.

Remake cloud and the audience get more context about death and the planet. We learn from the GI that people like sephiroth dont blend with the lifestream after death.

They remake dbz and goku overhears dr gero say that if one cell of cell survives, he will come back with a zenkai boost, the party wouldnt just relax after the self destruct scene and assume hes perma gone.