In the past releases there were only modifications and fixes on the 'new style' usage of the Nagios plugin check_esxi_hardware. So many features are actually not covered anymore by the old way of using the plugin, which was for example:
./check_esxi_hardware.py https://esximachine root pass dell
I updated the documentation on the official plugin page that only the 'new style' usage with the parameters are shown. This should help get rid of some confusion ;-).
Enjoy the weekend.