BR said so too. He said that we conceded more than anyone else from set pieces last season and they needed to look at it.
On Amartey, I'd also agree that his performance wasn't special. Evans did well but Amartey and Soyuncu hardly had to do anything. He did great to play two 90 mins in four days but I'd still like to see him move on this week.
We've had five years of evidence that he's not up to it.
To be fair, he has not played at center back.
As a defensive midfielder or right back I think he's just not needed. As a center back...maybe? Too early to tell.