Cayde wouldn't have needed to bring out his Ghost to heal him if he hadn't taken so much damage in the first place, but he needed his super. The whole time the Scorn pummeled him on the ground, Cayde was going into his menu to switch his super.
Destiny 2's terrible load times killed Cayde!
Edit: Apparently this is a spoiler to some people, and for that I apologize. I just thought everyone knew because said spoiler is pretty much everywhere by this point.
-
They should def kill off ikora or zavala. Have us join cayde in fighting in the reef. Make him more serious this time around, some humor not too much. Depends how this story fills out but i dont really care about anyone in the tower now.