Well, Jim isn't wrong. After finishing the 100% charge on Sunday afternoon, I went for a short but energetic drive around the neighborhood and bled off 19 GIDs so it wouldn't be sitting 20 hours at 100%. Hx was 82.36 before that drive and 82.62 after. Monday my spousal critter worked at home, so I commuted with plenty of squirt/regenerate/squirt cycles, and am generally trying to drive NON-gently in non-eco/B. SOH went back up to 85% overnight on Sunday, and Hx is now back up to 83.54.
I don't know how we could tell if this is "real" or if it is just gaming the Hx algorithm, but it's more fun than driving like a granny. It also has amazingly little impact on my miles per kWh, which is a big plus for the Leaf. I feel guilty driving my Subaru with any verve since it just wastes gasoline pumping extra air though the engine then heating the brakes. At least the Leaf recaptures a fair amount of the excess kinetic energy.
I'm just worried all that torque is going to shred my almost-done tires. But I needed a good reason to get new ones before the rainy season(s) start anyway. Removing all the remaining tread by challenging the traction control should do it.