I'd love a "You've been charging for xx hours:xx minutes within the Leaf app. I charge at work and like to charge for the maximum allowable time before I get charged more. So I'm charged for every hour I'm there, with a 15 minute grace period. I'd love to make sure I get there by the time the grace period ends.
Currently I could set a phone reminder while noting the time, but if this was built in I could just request a carwings update, then see the timer in real terms (you've been charging for xx:xx). I'd love that.