Getting your soul back is vastly different then from getting redeemed. By getting her soul back she is reborn basically. The Banshee Queen is no more long live Sylvanas!
Anyways I predicted all of this remember? I said Sylvanas will be made mortal again… and that the Alliance will take her in to protect her from the Horde that wants her head.
Even by that logic, you could still say the Banshee Queen redeemed herself by choosing to turn on the Jailer at that moment, which caused him to relinquish her soul in the first place.
“Good Sylvanas” had nothing to do with “Bad Sylvanas” faction swapping at the end of the fight.