Will YaST ever allow installation of proprietary nvidia drivers during install?

This is one of the biggest strong suits of OpenSUSE, it’s NVIDIA driver support. Is there current a way to install the drivers during install, because the FOSS aren’t as good? If there already is, how? If there’s not, will there be? And if yes, when?

Not until such time as NVIDIA chooses to change the licensing on their drivers, no.

You can create your own installation media (*.iso) with additional features.