Winning at the slowest possible speed is an old racing philosophy espoused to great effect by Alain Prost in his Formula 1-conquering days, so there's some irony in how last season he watched a Formula E rival put it into practice.
The Renault Z.E.15 was the pick of the powertrains in the first season of open motor/gearbox/inverter competition, and the evolutionary Z.E.16 kept the Prost/Jean-Paul Driot-run Renault e.dams team atop the pack in performance terms. But Lucas di Grassi and Abt Audi Sport, with a sprinkling more Audi assistance than before, managed to steal the title at the final round... despite being slower throughout most of the season.
That's not the sort of winning at the slowest possible speed Prost would have had in mind, but it was unlikely to happen twice. That's why Audi had to get involved properly. And that's not a subjective view - that's straight from the top of the Audi motorsport tree.