More links to this guy. Don't really know what to make of it, but it's always more plausible when it's someone you've never heard of.
I do think it makes more sense to buy an LB if we're bringing a defender in. Spending big on CB cover, at least this summer, doesn't seem like a great idea. White should be able to cover RCB (with Timber or Tomiyasu at RB). Not as sure on Kiwior, but you'd think he can cover LCB. Timber looks like he can play on the left, but I'd love to get a more natural LB in the squad as well, who can play down the touchline and not necessarily drift inside. I think Zinchenko is done here – being both weak and slow is just too big a liability for a fullback in a side trying to win the Premier League. This guy Kadioglu is right-footed though, and grew up as an attacking midfielder. But maybe that makes him an asset for Arteta.