Bloke in the video's not a good player
To be fair, he said in the article that although the controls were spot on, the cover system is very awkward to get used to. It looked like that was why he kept getting nailed when trying to flit between cover, and consequently started to hang back.
You can see some type of curved arrow command on the concrete blocks when he's moving in and out of cover. I suspect it has that magnetic feeling that can really irritate when you're trying to move off, instead of around. Until you get use to it of course.
Shadow of Mordor has similar issues at times, and Assassins Creed if I remember rightly.