I have an Argentinian friend and they don't really rate him and tbh Argentina aren't a great team atm despite having Messi and Di Maria. They're also not potential world cup winners, judging by how they struggled to get through their group.
I'm open to the fact that he might come back and do well and you're right that he's a threat from set pieces, but he's not shown himself to be a great defender or great at passing out from the back.
You wrote off Walcott and said he was just coming here to retire, implying he was a rubbish, so I don't think you're a great advocate for judging players ability.