S4E13 - Why not shoot? WTF?

Ending was so unnecessary. Klaes Ashford knew or should know he was going get spaced/airlocked so he should've just killed Marcos which would leave the son in tears and emo-like with no one to look up to. They've killed most of the crew so how the fuck did they manage to still fly the ship and let loose the cloaked iron asteroid? Also what about the ship that shot EMP charges at it? Shouldn't it be still around? LIKE WTF with the ending?

Still, I love this show to death. One of the few shows not shoving PC/SJW or anything crap and just telling us a fun if not good god damn story. What sucks is Miller isn't around no more and I love the banter between him and Holden.