I don't think it had to do with them thinking the MTV interview made them look bad... heck, Mark has been saying it was Stapp all along. Remember the "rumors" of things he was saying during the PRS meet and greets with fans??
They are distancing themselves from the controversial stuff involving Stapp because they don't want the focus to continue to be on why Creed broke up.... but about the new band Alter Bridge! Plain and simple.