I think it is fully engrained in the minds of dealership employees to "fill up" vehicles whenever they come on the lot, both when they are new and when they come in for service. I don't think this was a big issue last year when nearly every LEAF manufactured was quickly received by a customer who had been awaiting its arrival for months.
But now sales are slow and LEAFs are starting to accumulate on dealer lots in the middle of a hot summer. And I expect that practically every one of them is sitting on dealer lots at full charge.
Today, I took our LEAF in for service tomorrow. I thought they would probably charge it up tomorrow during service in the 95F heat, but I figured I would pick it up quickly to reduce the SOC. But I decided to check the car this evening and they have already fully charged it. I thought about dissipating some of the charge with the climate control, but it is connected to the EVSE, so that won't work. If they had simply hooked it up and not pressed the button, it would charge to 80% in the early morning. Or, better yet, they could simply not charge it at all.
Anyway, it seems that in light of the fact that these cars already have a pretty limited battery capacity and in hot climates some LEAFs are losing capacity at an alarming rate, dealerships need to take better care of the batteries of LEAFs in their care. Unfortunately, they do not know any better. In fact, I'm convinced they think this is the best practice and see it as a service to their customers.
So how does this get changed? IMO, Nissan should have an extensive education program for their dealership employees to convince them to change their behavior in regards to EV charging. As it is today, Nissan doesn't make it easy for them to take proper care of the cars. If a dealership wants to charge a LEAF, the button is their only convenient option, so it is a little hard to imagine them doing anything different than what they do today. Perhaps the real solution is to add a new "storage" charging mode to their EVs in the future and have it be the default for new cars. This mode could override the button so that it charges to 60% SOC or even something a little lower.
So what do you think is needed to put a halt to the needless LEAF-torture?