The 'begin versions without MAC address parameter have new ordering of parameters.
You can't do this. There are other Ethernet libraries now which have begin without the MAC address parameter, but they use the same ordering of parameters as the version with MAC address.
Yes a network engineer would prefer ip, subnet, gateway, dns, but Arduino introduced in 2008 an ordering based on optional parameters defaults, where it is more likely to need to set a specific DNS IP and then a specific gateway more likely then a subnet other than the default. Doing this in different ordering doesn't make sense.