Few things:

3D cursor is always reset to <0,0,0> before importing,
Swapped Model Cleanup from Disable to Enable,
Removed maxpath limit in LDraw Path field
Added Set Origin to Geometry import option (incomplete, see comment on
line 69),
Added Link Alike Mesh import switch (incomplete, script does not
duplicate alike mesh, instead reimports it. Needs to be changed to
duplicate existing mesh, and link if switch is activated)