But he was pretty passive throughout the whole thing. He wasn't a brilliant tactician, he wasn't the team's strategist for most of the movie. Near the end he gets to do stuff and the stuff he does doesn't really impress. Cap wasn't a team leader, he never managed to motivate the team himself, no big rousing speech, he was basically just a foot soldier only amplified, and it felt like a pointless addition next to Black Widow and Hawkeye.
Yes he had his moment, but it felt like it was too little too late to save his presence there. Which is weird, because he was an excellent point of view character at the stat of this movie and at the end of his own. Fish out of water, but it was hardly touched upon. I never got into his head, everybody else had an outspoken character, save for Captain America, heck I know more about Hawkeye as a normal person than I do about Rogers.
This was much more of an Iron Man/Thor movie, with the Hulk thrown in, and with the Black Widow as the human character to connect to as an audience, when it could have been Captain America as the point of view character to introduce the situation and others.
This movie and Thor's own movie have made me really interested in the Thor character and his corner of the Marvel Universe.
To me it felt like he was definitely the leader. He was the one who stepped in to break up the fight between Iron Man and Thor. He drove the team onwards, determined how they would fight and gave the orders in the field.
The two most powerful warriors are patience and time - Leo Tolstoy