Just read this comment on youtube; "Sylvannas plan is to tear down the actual shadowlands system. She thinks is not fair that you dont have freedom choose your fate when you die, and instead remain slave of a Covenant for the rest of the eternity. She wants freedom, not
servitude or torture after death. Thats why she has been enpowerign the jailer all this time, by feeding the maw with souls (thats why she started the bfa war, to kill and empower the maw). Because only the jailer can help sylvanas to achieve her goal." (lous F.R)
And it holds enough truth to it that it seems really likely by the end of her arc and plans being revealed, it will come full circle where we as a onlooker couldn't see the end goal good she was doing for us and it required sacrifices we saw as evil blah blah. Resulting in her being labeled an Anti Hero for freeing us from death or something along those lines.
Atleast thats my prediction by end of SL right now..