Phoebe Waller-Bridge’s edgy thriller began with all the necessary zing that came with unhealthy, co-dependency between an MI6 agent and her nemesis, a cut-throat Russian hitwoman. Showrunner Suzanne Heathcote mainly turns her creative lens towards the evolution of Killing Eve’s double protagonists, but while one evolves while the other mopes and whines. Bizarre character arcs do not necessarily require ostentatious …