Seems quite strong at set pieces, yeah. Mad statement to say Romero is shit in the air, misjudging a few set-pieces after missing three months out in a team that's changed coaches mid-season doesn't make you shit in the air. Physically he's quite strong in the air and has made some sloppy errors. Bastoni isn't very quick in defence, he's a strong runner when carrying the ball but his turning speed is quite slow.Is Schlotterbeck good in the air? How physical is he?
I've only seen a bit of Bastoni, and he seems ideal cos he's pretty tall and fast attack minded CB (Dier is slow, Romero shit in the air), but he doesn't seem to be anywhere near Romero in terms of actual defending (few are).
Gvardiol would be the most fun pick.
Schlotterbech is a really superb footballer and seems a total stud, captain type. Passing is off the scale. Reads game very well. Looks the kind to be a top player for years. Again, I can't really speak on Gvardiol.