I don't see electric as the be all end all. I agree with a previous post that customer cars should be a way forward. The problem is the series is too reliant on the manufacturers and the problem is when you see them leave you are in limbo. As we have seen in all motorsports, even F1, manufacturers will leave when it suits them, whether they are winning or losing.
Therefore they should look to attract manufacturers to enter the series and also for to supply cars to teams. And they should use this time to see what rules would get more makes and manufacturers into the series. Manufacturers do add to the series, but they shouldn't be crucial to survival
Anyway that's my two cents
