Well, she's gone. I turned in my '11 LEAF yesterday. I truly enjoyed to the car, and had every intention of buying it off-lease when I first got it. In fact, my wife had to insist that I lease it instead of buying it. Sadly, the battery degradation proved to be too much. I was down 2 bars, and down to about 60 miles range (from 80 or so when new) and I was increasingly having to forgo weekend use, or plan those days around charging. I'm sure that by the end of the summer, We'd have been often driving the ICE instead on weekends.
If/when Nissan improves the battery degradation, I will happily consider coming back, but I want my cars to go ten+ years, not just barely three.