I hate how jealous and petty these women are. Anastasia never asked for any of this. She was literally stolen from her home and dragged to the palace. If the Sultan likes her then that's not her fault and this is a harem, he was never going to just pick one of these women and remain faithful only to her.
Compared to the way the harem was run in Hürrem's time, they got really sloppy here. Random girls just coming into the favourite's rooms to beat them up? Locks on the inside of the girls rooms? And zero guards or attendants to hear loud screaming for help. Sure, it's part of the plot, but makes it look like the harem is run like a zoo.
Yeah they were a bit inconsistent with her look in the series. The other actresses Beren Saat and Nurgül Yesilcay who play her later have a darker look. Bit unlikely that someone goes from golden blonde to dark brown as they age.