I actually agree with Scrubber
Folau is amazing at what he does and what he does only. He does two things. He catches high balls and he beats defenders every time.
Defensively questionable, can't kick, makes terrible mistakes under pressure and lacks the rugby nous to be a real fullback. He should have been kept on the wing as he is a winger.
He should have been dropped during and after the World Cup and we should have pulled out the stops to keep KB (Kurtley Beale) as he should of been our incumbent fullback. Just as we should have pulled out the stops to keep To'omua as he should have been our incumbent 12.
His form isn't and never has been a temporary issue. He doesn't have the skill set to be a consistently great 15 (or 12,13 for the matter).
If i had the option of any of Hogg, Brown, Halfpenny, Dagg etc all would start over Folau at 15.