Average doesn't mean alot for a spinner. In OD a spinners job is to keep the run rate down and squash the batsman for the pacers to rip through imo.
That's why the team is fine as it is, we don't need any changes just yet . Izett pretty much sealed his place in the team this series for the rest of his life.
Lozzana had a good game as well, which is good to see. Are there actually any more games left for the boys in black?