Random thought...
If we could put Formula-e's engines and batteries on a "roll cage" with some panels to make it looks like a Skoda or a Fiesta... How many stages would that car be able to run? I mean, Formula-e races have 45min on medium to high performance power. If this "eRally car" could run in some of the WRC stages. Like 4 stages per day - Two in the morning, charge/change batteries, two in the afternoon - Couldnt WRC already try an electric class just for the sake of it? Like MotoGP have its own electric class.
I mean... it could even be as powerfull as the R5s or the top class, but running less stages. Maybe just the first loop of the day.