Shadow and Bone is fine for what it is. But those actors are not remotely in the same league. One of the reason that HaT works and got great reviews and high audience scores is because of the terrific chemistry among the cast - review after review mentions it.Tbf I don't think to many people go to the movies to see those characters.
Take away Pines franchise movies like Trek his movies don't tend to do that well.
Hugh Grant gaunt been that relevant in decades, Michele never really was shes a supporting actor.
They coukd get along more bang for buck casting relative unknowns in a TV show (see Got Season1 or Shadow and Bone).