Backdated from what date? If CAS sees this as systematic doping then there's no way in hell they'll reduce the penalty to such that it is effectively zero.I am thinking that CAS have already decided. 34 players guilty with penalties backdated, so there will be no suspensions.
It's entirely at CAS' discretion and complex cases like this don't simply take a week or two to decide.
These people don't deserve any backdating and perhaps that was the long term plan from Essendon - attempt to delay it as much as possible because they knew they were going to be found guilty eventually so try to minimise the fallout as much as possible. And that means hope for backdating because of "administrative delays".