It is admirable that they have gone full electric and not put a small petrol engine there and made it hybrid but in the end all that seems to be happening is that the preconceptions about eletric cars are just strengthened. They are slow, heavy and unexciting. And not even eco friendly.
The one single electric car that has been even slightly exciting is the nordschleife electric lap record by toyota in 2011 I think. But even that 7:22 time is kind of good / kind of bad when you think that the radical sr8 (which is the same chassis toyota used I think?) has done lap time of 6:55. What electric cars need is a proof of concept that they can be faster than similar normal cars.
Very few are interested about steam car racing because they are slow and heavy. They are unique and for the engineering types there is some attraction in the technology of the cars but as racing cars they are still slow. It could even happen that electric cars just are never going to be interesting for racing. Everybody seems to think that electric is not good at the moment but in the future it will be the only thing. I doubt it. It will take massive amounts of money to get the battery technology to such level that it makes sense from racing perspective. Then it needs the money perspective taken care as well.
Of course rules can be changed to make any kind of engine competitive. The rules were bend for diesels so that they could be competitive (and probably still are?). But are there people who are inspired and awed by diesel race engines? No. But there are people who are interested about the hybrid technology because it adds something. It adds power and that is exciting. The additional weight is something never gets mentioned and in some ways the added complexity of hybrids is exciting as well. But electric and diesels? Meh.
A lot of people watch boxing. A lot of people watch ufc. Some morons even watch wwe (sorry)(not really). Would anyone watch boxing where the boxers move slowly, punch like little girls and can only do 20 second rounds?