Regarding point 1: Remember every reincarnation done that way effectively kills the original soul/host of the body. The Dark One isn't making a new body for the Chosen he brings back, he literally just forces their soul into an existing vessel. So the creation of Osan'gar and Aran'gar [and the others] meant the deaths of a random man and woman in order for the return of those two Chosen. So Aran'gar, the "man in a woman's body who is definitely a sexual predator" as you describe him, only exists because a woman was murdered by the literal Devil of the story and replaced with a man who had already lived for centuries and then recently died.
Worth noting that this "Devil forces a soul into a different body" concept was recently done in an Immortal Hulk comic and when that experience was used by the character to try and empathise with a MTF in the comic the MTF went batshit at the suggestion their experiences were anything alike. Ofc this missed entirely the point that the character in the wrong body quite literally did have the worst of their two experiences what with the fact it was originally Doc Samson now stuck in the body of Sasquatch. But no, the pissy little MTF character had to have their soapbox moment and make everything about them despite Samson quite literally existing as he did then because The One Below All, the literal antithesis to God in Marvel: The One Above All, had forced Samson into someone else's body.
Back on point: channeling strength is linked entirely to the soul. This is why Aran'gar still channels Saidin and why those reborn don't lose any strength outside of special conditions. Those that do lose strength do so because of conditions inflicted upon them: Cyndane gets drained [too fast] by the Eelfinn [which in some ways is a blessing as she only goes from 1(+12) to 2(+12)] the other person that gets drained, albeit much more slowly, goes from 13(1) all the way down to 66(54) however gained the ringlet angral that effectively meant she could channel more power than her original base value, and Siuan is Healed by the wrong person [as it requires someone of the opposite sex to properly fix Severing]. There are likely other examples but those cover both the more significant characters and the methods involved.
Point 2:
try to show how her behavior is really some man's fault and she's just the victim
100%.
They will make every single concession possible to scapegoat her as she never had a third name in the Age of Legends which will be spun as "The Patriarchy" holding her back and it's not her fault that in order for her to be on equal footing as the men she needed to prove herself through dangerous means that meant she created The Bore and literally caused the Apocalypse. Watch them, as always happens, take all agency away from her and turn her into a victim where everyone else [especially Lews Therin who turned her down] is at fault. I'm not really expecting the series to get to the end in any reasonable form so if they do somehow get to the actual end of the books watch Twitter and other platforms go full sperg when Perrin snaps her neck with one hand in Tel'aran'rhoid just as she's about to murder Rand and the two women he's with who are literally fighting Satan at that moment.
Regarding point 1: Remember every reincarnation done that way effectively kills the original soul/host of the body. The Dark One isn't making a new body for the Chosen he brings back, he literally just forces their soul into an existing vessel. So the creation of Osan'gar and Aran'gar [and the others] meant the deaths of a random man and woman in order for the return of those two Chosen. So Aran'gar, the "man in a woman's body who is definitely a sexual predator" as you describe him, only exists because a woman was murdered by the literal Devil of the story and replaced with a man who had already lived for centuries and then recently died.
Worth noting that this "Devil forces a soul into a different body" concept was recently done in an Immortal Hulk comic and when that experience was used by the character to try and empathise with a MTF in the comic the MTF went batshit at the suggestion their experiences were anything alike. Ofc this missed entirely the point that the character in the wrong body quite literally did have the worst of their two experiences what with the fact it was originally Doc Samson now stuck in the body of Sasquatch. But no, the pissy little MTF character had to have their soapbox moment and make everything about them despite Samson quite literally existing as he did then because The One Below All, the literal antithesis to God in Marvel: The One Above All, had forced Samson into someone else's body.
Back on point: channeling strength is linked entirely to the soul. This is why Aran'gar still channels Saidin and why those reborn don't lose any strength outside of special conditions. Those that do lose strength do so because of conditions inflicted upon them: Cyndane gets drained [too fast] by the Eelfinn [which in some ways is a blessing as she only goes from 1(+12) to 2(+12)] the other person that gets drained, albeit much more slowly, goes from 13(1) all the way down to 66(54) however gained the ringlet angral that effectively meant she could channel more power than her original base value, and Siuan is Healed by the wrong person [as it requires someone of the opposite sex to properly fix Severing]. There are likely other examples but those cover both the more significant characters and the methods involved.
Point 2:
100%.
They will make every single concession possible to scapegoat her as she never had a third name in the Age of Legends which will be spun as "The Patriarchy" holding her back and it's not her fault that in order for her to be on equal footing as the men she needed to prove herself through dangerous means that meant she created The Bore and literally caused the Apocalypse. Watch them, as always happens, take all agency away from her and turn her into a victim where everyone else [especially Lews Therin who turned her down] is at fault. I'm not really expecting the series to get to the end in any reasonable form so if they do somehow get to the actual end of the books watch Twitter and other platforms go full sperg when Perrin snaps her neck with one hand in Tel'aran'rhoid just as she's about to murder Rand and the two women he's with who are literally fighting Satan at that moment.