I'm not so sure.
I have just been reading the actual
text of the report itself, and I am not so convinced that this appeal has been successful on the grounds that the tests were not properly administered.
It's quite a long document, and typically over-exhaustive, and it spends a lot of time debating over how the "exceptional circumstances" defence is parsed by either the ICC, WADA or the PCB, but it seems to me that the tribunal found that it was a reasonable defence for Shoaib and Asif to claim that they weren't aware that the supplements they were ingesting were on the banned substances list.
To establish this, it appears that the tribunal has accepted that the PCB failed in it's duty to properly educate the players as to their responsibilities when it came to banned substances. So effectively, it appears to me, unless I am mistaken, that ignorance
was in fact accepted as a valid defence, and it may even be the central basis on which the appeal was upheld.