Responses

Armin lacks the confidence in leading a team, unlike Erwin <- I agree here. But I can imagine Hanji taking leading tasks over and Armin be the brain of team.
Armin lacks the confidence in leading a team, unlike Erwin <- I agree here. But I can imagine Hanji taking leading tasks over and Armin be the brain of team.
If Armin gets the titan power, then we get a not only powerful but smart titan. I feel like the story is leaning towards Armin getting it since Armin's childhood is mostly him realizing how physically weak he is. This seems like a great opportunity for the story to take a turn in Armin's perspective.
However, Erwin is a strong asset to the Survey Corps team. Erwin has been working hard for a long time to know the truth behind the titan's story. However, he can be replaced with Hanji, whom he gave the right to succeed him. But Erwin's leadership skills remain unmatched. Armin lacks the confidence in leading a team, unlike Erwin.
I love both characters equally, and seeing either of them gone is upsetting.