Nah, that's the best way to do it. After not hiring Trixie, I think you may need to hire the other lab tech, not waffle, then talke to Ms Chang about it. Trixie should still show up in the rain that night. As an aside, if you never get Candy's agency contact from Trixie, it used to be her subway porn scene would be unavailable (first on left, middle row). The games are a bit different now, so not sure that is still true.