Yes, as far as hatchbacks go, the Leaf has very generous space in the passenger compartment (heaps of leg and head room), but they seem to run out of time before designing the boot.
Boot volume is one thing, usable floor space is entirely a another.
My Gen 2 Leaf fits 2x 30 litre storage cubes.
My little AE101 Toyota Levin coup fitted 5. Even my 1993 MR2 fitted 3!!
Nissan simply wastes space through laziness (not just a Leaf problem). For instance, in the Gen2 Leaf the residual Gen1 charger humps cover nothing - they are empty space and function-less (trust me, I looked) - they removed the humps finally in the Gen3.
Do the panels from the Gen 3 fit the Gen 2?