movies like "Deidra & Laney" don't typically need expert plotting to keep us glued, but as the girls' scheme expands and threatens to upend their lives in ways it's easy to anticipate, some steam is lost in the mostly formulaic effort to wrap things up
Freeland and Farrell don't push the tragedy far enough to earn much comedy, and the result lands "Deidra & Laney Rob a Train" smack in the middle of the train tracks
