Just so no one here is confused I am speculating here.
If her being a lush was the sole actual reason for being fired wouldnt WWE offer her rehab to her first even just to stick it to her? Again remember a similar excuse was made for firing Mickie James to cover what seem to be an overabundance of "reasons" from being a bunny boiler for Cena, releasing a country album, getting fat and studing online.