He's cut the big errors out of his game (although there was that moment against Hoffenheim I referred to) but he remains a fairly poor shot stopper, organiser, distributor, etc., so his inadequacy goes under the radar a little these days. Unfortunately, Karius doesn't seem much better, and I fear his signing was a wasted opportunity.
Obviously as good a goalkeeper as we could get, but someone like Schmeichel or Fraser Forster would do. Ultimately, though, it's pointless to speculate because, as MadLad's catchphrase goes, Klopp's happy with our goalkeeping options.