I love that it looks ludicrous to Thanos too. Look at his face, he's all "I don't get it. Why aren't you squished yet?"
https://welshyfilms.files.wordpress....rica.jpg?w=640
Hawkeye has far more substantial showings than a lot of these characters. Hawkeye has demonstrated proficiency in contributing to the defeat of alien invasions before and practically shot the hellicarrier out of the sky. Avengers and Age of Ultron both treat him like a core member of the team. Dropping him for Wong and Mantis feels like a disservice to the previous Avengers films.
I actually think it would be totally in line with what all these Marvel movies have been to have one scene of Tony, Quill, Parker, Strange, Lang, and Rocket all mouthing off simultaneously until like Gamora or Banner or somebody reminds them what's at stake and that they're being idiots.
I agree with almost all of this. Many of the phase 2 and 3 movies have had something to say about something on top of being action spectacles. Like you say, GotG is about dysfunctional family relationships. Plus Black Panther is about marginalized people, Ragnarok is about legacy, Civil War is about justice, Winter Soldier is about freedom, etc. I think the Russos have been a big part of that and I trust that they'll do a good job with this.
I also love that we'll apparently be getting a history and a story for Thanos. We know all the heroes, so it's great to get to know the villain.
And my one disagreement is that I am more enthused about all the different character interactions. I do know and love all these heroes and I do want to see what happens when they all meet each other.