He's sort of the ideal wing back in same way Alves was. A winger converted to wing back by Barca. Alba was the same, Mascherano is the same. Barca don't do proper defenders, they need defenders that can play in the final 3rd because they dominate it so much.
He had a decent reputation before he went to Barca, i'd question his mentality though. Moving to Barca knowing that he won't be able to play for a year due to the transfer ban, same as Turan. Moved to a huge club knowing won't be first choice, won't actually get to play for a year anyway, but just pick up big cheque. Not sure I'd have him here, doesn't seem the type that would buy into Klopp's way.
think Klopp will continue to look for players between 20-23 whose style can still be moulded into the way Klopp wants to play.