When it is written that much of the Ingles is now on roads, what you will find is that the majority of the roads which the Ingles walks on are very little used country roads, where you can walk down the middle of the road and you move aside when you see the occasional car / van / tractor coming. Personally, I didn't see walking on country lanes that big an issue.
The exceptions on the new route are the walk from Cos to Presedo on the Betanzos to Hospital de Bruma section, and later on at that section, the 1 to 2km walk past the large electricity substation and Bar Avelina.
The new detour on the motorway embankment outside Sigueiro actually takes you off a country road and onto a grass path on the motorway embankment (there is a wire fence separating you and the hard shoulder of the motorway, and therefore there is no safety issue on this path). However, if I did the Ingles again, there is no way that I would go down this section again and carry on down the tarmacked road and walk on the country road of the old Ingles to Sigueiro. It was simply soul destroying walking for the good part of an hour watching noisy cars achieve in a minute what you will do in an hour ….. and there is also little privacy if you need to relieve yourself on that section!