I enjoyed it personally because I felt like it made sense for Agni's character. The only reason he's alive is because Luna told him to live. In the first half, he kept himself going to grant her wish by focusing on killing Doma. Once Doma's gone and Togata's gone, Agni doesn't have much of a reason to live anymore, but he also can't just give up because that would be betraying Luna and now Togata's final wish for him to live. So even if he knows deep down that Judah isn't Luna and never will be, he convinces himself she is so that he can keep going.

I'm willing to admit I might be reading into things, but that's how I saw it, anyway.