No.
None of this is a fact.
It's all baseless and fanciful opinion that borders on trolling because of how fanciful it is and how it ignores literally all available evidence.
She's going to "set us free" only in a negative way, by doing something dumb like trying to end death for all beings, and/or freeing all the horrifying things imprisoned in the Maw. There's zero evidence to support her caring about anyone but herself, which is totally unlike Illidan or even Kerrigan.
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Wait wait wait, you don't think we're meant to hate Sylvanas? Sylvanas who is basically a traitor to the Horde, who tried to murder Beloved Character (TM) Thrall and succeeded in dishonorably and pointlessly murdering Beloved Character (TM) Saurfang right as Saurfang was showing true bravery and honor, and who said "The Horde is NOTHING" before flying off in a cloud of pure evil to beat down Beloved Character (TM) Good Guy Lich King Bolvar Fordragon and then blowing a giant hole in the sky?
I think the only response to that is "man what?!"