1 & 5 are basically the same point...hard to imagine a mother doing it to her daughter for any reason. Agreed on that point.
2 it worked, so not absurd
3 yeah...and..?
4 I addressed this in my post, this is the main reason why I don't think it's her.
Again, despite the above, I don't think it's Evelyn because I don't think she would blend in at the party and Ashe didn't have her phone for the second task. I just saying she has the means and motive, plus more than enough knowledge of Ashe's psyche. She's also one of the only characters that doesn't require an explanation as to how she found out Ashe is a duplo - the others being Fiona, Kate, Delilah (all three could have seen in Ashe x Zoey), Rachel, and Natasha (from the pat-down).