Hi,
I've heard very few Leslie simulators that even
come close
to sounding like a real Leslie.
all of your points are right, especially the last one ;-) .
I have a Hammond XB-1 here, and even this machine offers a
really good sounding Leslie simulation.
IN fact, besides the effects you desscribed, it's also true
that even a true Leslie doesn't sound true as soon as it is
conserved in a stereo recording.
But anyway, there have been good emulations like found in some
Dynacord devices, so I guess it is possible to create a cool
digital emulation, even if it never will sound like the
original.
Best regards
ce