Things I would want (beyond a 20 mile range):
1) A nav system that doesn't suck, and doesn't cost $180 a shot to keep current (WTF?!). It was not a big deal when I bought it, but it will give me a lot of pause about buying another Nissan if it is not at least 5 years of free updates, and as well as being a decent system in the first place.
2) Better visibility. The columns in front are really obnoxious, and the headrests in back further impair vision, make it easy for those to flip down.
3) Cut deals so that there is one unified charge system for Nissan owners. Having a stack of cards, or having to call (stupid AV!) really makes the thought of using my leaf for a real trip unappealing. I don't need it to be free, just a unified way to driver up to all the major networks and charge easily and for a fair per use or per kWh fee.
4) Spare tire. I have more flat tire anxiety than range anxiety.
5) Driver only climate control option.
6) Fewer buttons, more knobs. The smooth faced buttons makes it really hard to blindly reach and adjust the AC, or do anything else in the telematics unit.
7) Let me override the GOM by putting in my own preferred miles/kWh, and set my own desired reserve. I'd likely just set mine to 4 miles/kWh and 10 miles reserve and be done with it. The GOM vastly and needlessly amplifies range anxiety. I'd rather have a slightly pessimistic reading all the time than a wildly varying readout.
8) Quick release back seats would be nice so I could remove them most of the time to shed weight and more easily haul crap. My ideal scenario would be to run with just the 40% of the 60/40 back seat so I could strap in my kids car seat as needed whiel having cavernous space for Ikea runs and similar.
9) Move the charging port to the side like Ford does. I have never like the aesthetic of the mini-hood being popped up while charging.
10) Let me turn on the radio without having to turn the car on, and let me have the doors open without chiming at me so I can use my car for tunes while working in the garage (I ripped the chime out of my Truck to let me do this, and my wife's Focus lets me just power the radio for an hour without the key).
11) The cabin air filter should be MUCH easier to replace. The current location is a real loser in my opinion.
12) Use accelerometers and GPS (for altitude rate of change) to better estimate the potential energy and kinetic energy stored in the car for calculating the miles/kWh readout. The display is only useful today if you have the cruise control on and are on flat level terrain. I'd rather have a fairly stable readout as to my current energy consumption (factoring out stored energy int he form of changing speed or altitude) rather than one that wings between 0 and 8 miles/kWh every time I slightly speed up or slow down. The readout between the telematics and the dash should really match if I reset them at the same time too...
13) Either you need to adjust the maintenance schedule, or fix whatever you under-engineered that calls for changing brake fluid as often as 15k miles. It seriously makes people wonder about the car's design.