Assuming nothing the company should still be banned since (at least in my understanding of the 'informatin' provided) they knew the CPT was intoxicated before they let him take the flight that returned (this now assuming that the company does actually say the truth about the captains intoxication).
The problem now is that should the company try to put some public attention on the CPT (in order to have a more peaceful and quiet time for themselves not to follow procedures ((and I am assuming here too)) ), then they should be not only banned but forced to permanently end operations with mamagement becoming no-go's for any new start-up bcause they actually first try to ruin a career deliberatly by untruthful statements in order to cover up...
Now since that again is speculation, what we really would need is the complete story.