I was basing my speculation on the items that are most complained about for the existing car. Their sales have taken a beating. They need to either drop the EV line or fix the primary problem/s. I have a tiny little bit of faith that they might do the second.
Re: the bolded part, have they? Do you have some global sales figures for Leaf for 2019 YTD vs. previous years?
Sure, in the US, Model 3 is decimating everyone else in sales but there are plenty of EV markets outside the US besides Nissan having expanded into more markets.
I like this as a wish list, but I think it's probably a bad bet as a prediction.