Is he not totally right-sided though?
As opposed to our Right Footed Left Winger. Not much a difference there.
Jonas can't cross with either foot, but playing him on the left works to an extent because he's quick, a good ball carrier and can take people on (or atleast last season he did). Larsson is a 'wide midfielder' more than anything, not much pace but has reasonable delivery. He's very right footed meaning he's almost exclusively right sided - playing him on the left negates his best attributes and playing onto his left he's even more inadequate than Jonas there.