Good that it has been granted: even so he was convicted under the law at the time. My fear is that we may be on the track to further injustices. This is in the matter of allegations of paedophile activities of elderly men going back several decades.
The danger I see is convictions handed down for or including matters that would not have been convictible at the time, or considered minor. Retrospective changes to law, de jure or de facto, are IMO abbhorrent.