The definition as proposed is prefaced as a 'geophysical definition of a planet' which already admits that it is using the definition based mostly on if the geophysics of the body is planet like. Saying pluto is a dwarf planet seems pretty good to me as it gives it a special place among planet like objects already. To increase the number of planets to over a 100 objects seems a bit silly. Astronomical bodies that orbit the sun include thousands of things, if the object is really big and clear most of the orbit and is dominant massive object that makes it a proper planet. If it is round but not a big mass then it's a dwarf planet, which still suggests it has planet like qualities.