"As a Nissan Leaf driver without a home charger" isn't that the main problem and not the current charging network?
Most EVs charge at about 3mph from L1, and if you're on-plug for 10 hours overnight, hey, that's longer than a lot of people commute in a day. Might be able to keep your SoC pretty high with that alone.
Of course L1 is too slow to be useful for sharing, but for a resident it often works out quite well.
So far, I haven't needed to go to the fall back option. I charge at a l2 host place near my work, and once a week I go to a fast charger near some restaurant.