I do kinda wish that it was Levi who killed Eren. It's not like he didn't love Eren — platonic and familial love is no less strong and all-encompassing as romantic love.
Not to mention that he made a promise years ago that he would end the threat if Eren turned against humanity. That's Chekov's gun.
Plus, he was already robbed of a final conversation with Eren because Eren's a coward who can't bear to face his incredibly disappointed dad*. At least let him get some closure this way.
* This is only head canon, but I think that's definitely part of the reason for it.
Isayama said Eren had conversations to everyone.















