While I get Formula E's idea of taking racing to cities, I'd like to see a couple more permanent circuits now that the cars are a bit faster. There's some lovely circuits out there that might suit the sill relatively slow FE cars.
Yeah sounds fun. I guess all you need is to map out a route on google maps (or other online map of your choice).
I think they can certainly get away with more visits to circuits which sit within city limits. The critera seems to be more that it's close to a city center than that it is a temporary track. Hermanos Rodriguez of course is one of those, but also the likes of Buenos Aires, Portland, Imola and IMS to name a few could also be eligible should FE decide to visit more permanent facilities without diluting the ethos of bringing the racing to the people.
Fab on the competition side. Thought a little more and I think the best time for it might be after the Season 6 calendar is revealed... That way there's interest and people wouldn't unwittingly design a circuit that FE thought up simultaneously. I'll put that one on the to do list for now.