Besides that’s cool. By showing Vader literally physically lift up a whole person it shows his strength. He’s not just strong with the Force.

I was actually just watching a video explaining how no human could do that, so it’s either the Force, his cybernetics, or both.

I’d bet the reason Vader physically chokes Antilles is because the Force hasn’t been established at this point in the film. It’s notable that he only uses the Force after Obi-wan reveals it to Luke.

That’s what I assumed, but it’s never seen again, and so feels kind of place for relatively little gain.