Why not give an argument to the kernel to create the new devices as "fooX" (foo being a supplied parameter) - and let udev userland deal with the renaming to "ethY" as it pleases ?
While this novelty certainly may appeal to the folks who are used to alphabet soup in the network adapters list, and I too think that the adapters that distinguish between the T568A and T568B cable layout have a degree of coolness in them by creating an extra value in being able to distinguish between the straight and crossover cables - overall it seems like a step back to me.
I would plug in the interfaces into a switch - and all I care is to find the same MAC address as I see on the switchports - not which bus they attach to.
While this novelty certainly may appeal to the folks who are used to alphabet soup in the network adapters list, and I too think that the adapters that distinguish between the T568A and T568B cable layout have a degree of coolness in them by creating an extra value in being able to distinguish between the straight and crossover cables - overall it seems like a step back to me.
I would plug in the interfaces into a switch - and all I care is to find the same MAC address as I see on the switchports - not which bus they attach to.