Iirc the scrapped 27 ruleset said that the Rally1 still has to resemble a road car (no matter if it's hatchback, sedan, suv or even a concept), so that's not really an issue. The difference is that they don't need an approval from manufacturer.

Imo that will open doors for support from local dealer / manufacturer branch. Paddon have enough support from Hyundai NZ to build various cars, that will never be FIA homologated because there is no support from Hyundai. Now that won't matter.