The update is supposed to just fix a BMS capacity display error. Nissan claimed originally that this was the only issue with the 30kwh battery, but time has shown that many of those packs are just not good - they degrade quickly. That is one reason why Nissan now replaces the ones that are covered by the 8 year/100k mile capacity warranty with 40kwh packs.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.