The reason your GOM "seems" bloated when SOC is high is due to no hidden reserve. As the SOC drops the hidden reserve grows giving you the impression you are losing range much faster than you really are. Now, I am not saying your estimated range at 100% SOC is accurate but its not nearly as bad as you think it is.
At "zero" (according to the car) you have over 10% capacity in reserve. Unless you have LEAF Spy or something similar, you are driving blind with no indication you are running out until you start losing power. In the Gen one LEAF, I consider LEAF Spy indispensable.
I never mentioned the GOM. That's a whole other topic.
The issue is that I lose 40% in range (or more) in cold temperatures in the relatively mild Pacific Northwest.