Agreed completely, but Ellen Ripley's dead.
All entries in the series that have forced the inclusion of something/someone Ripley have suffered from it.
Isolation's a fluke, that succeeded because Amanda Ripley had no character- we filled her shoes.
So when she was saying goodbye to Ellen Ripley for the last time, so were we.
& Amanda Ripley's purpose is fulfilled narratively and thematically with that conclusion.