I bought, and charge to 80% M-Sat. going to full charge Saturday night so I can go over a mountain and across a desert on Sunday (70 miles, 30 at 55-65mph). I then recharge at my destination to 100% so I can return home. I use L1 charging at home, and converted L2 at the Sunday destination.
I try to avoid LBW, but in the winter I am seeing it within a mile or so of my Sunday destination. I could make it there without it, but I believe that it will not hurt the battery and may even help it to give it a workout one day a week.
If I was leasing, I would try to maintain the battery just in case I was going to buy it after the lease ran out, or to give the next owner a good driving experience if I don't. I want more EV's on the road, so I look forward to the used market being viable. If you leased this car to be good for the world, you will take care of it with that in mind. If you bought it to have the new cool gadget, you likely would not have posed this question.
For what it is worth, it seems like Nissan has you covered. I doubt a 100% charge will hurt the battery, but going to turtle too often likely will. At this point no one really knows but everyone seems to agree that keeping the SOC in the mid-range is optimal, and if you are above 80% you should not charge it to 100% until the SOC has been dropped below 80%. If you can charge once a week, charge to 100% when needed and don't worry about it. If you are charging from 60% to 100% every night, you likely should go to 80% and keep charging every night. If you were using most of the battery every day, you likley would not be asking the question, and 80% would not be considered. Is it better to charge every other day and use 80% of the battery? No one really knows, but your stress levels will be far lower if you have the extra charge available, so perhaps charge to 80% and use half the availabe charge daily.