For 1.
Lae’zel should be left dead. Because before entering the prism, she left the team, and after her death it was impossible to resurrect her.
For 2.
If you killed the Emperor, then the portal closes and you have to wake Orpheus.
Or the Emperor cannot be killed, because he has taken over the astral again, and this is his illusion. In fact, now you can say that, but it's not clear.
