Faf seems to be in a bit of a funk these days, maybe his magnificent catch to end the Pom innings will snap him out of it. He is still a better cricketer than most of the newbies we have seen.
South Africa has produced some amazing fielders. The great Colin Bland, still the finest out fielder I have seen. Then the like of Rhodes and Faf, guys who are capable of winning tests by spectacular fielding.
One place to start our recovery might be in the field, finding that sense of aggression in field placements and catching that creates pressure.