But, Garak, and Kor and them can join the heroes at any time, so long as they are not show leads.
In the vein of forgiveness, should Hitler or Stalin or Pol Pot or even Charlie Manson be given "second chances"? If we are supposed to forgive Georgiou, shouldn't she stand some kind of trial and serve punishment for her crimes against sapient beings across the galaxy, including the Talosians? For me, saving her own ass on Discovery isn't some kind of repayment for the wounds she inflicted on her empire and others.
It seems like Georgiou is merely an extension of Garak and Into Darkness Khan, an outside monster the Federation needs to do its dirty work. Except neither of Garak nor Khan were being turned into good guys and given their own shows.