If you are talking about the four extra little pins on the PCIe 5.0 AUX connectors with 12 large + 4 small pins, the small pins are likely there for remote voltage sense so the PSU can shut down if it detects excessive voltage drop indicating a bad connection or damaged cable so the PSU can shut down before something melts down or catches on fire. There is no shortage of charred GPU power connectors and PSU cables from bad crimps or loose fit, especially on AUX cables with dual 6(+2) ends.
Going to need to take into consideration how this affects room temperature - the heat has to go somewhere. More AC in Summer, maybe no heat at all in Winter.
Please elaborate? What did they get wrong, are you referring to the power supply