I'm just back from the Levante/Sanabres, so I've only seen the Vdlp north of Zamora. Yes, there was construction, and yes, some of it was very jarring. I'm thinking particularly of coming into Campobecerros. There was some construction going on near Lubian, and there were works in progress north of Zamora but they appeared to be halted in mid air. In A Gudina, there was an elaborate sign informing pilgrims that the camino had been re-routed and re-signed in order to skirt the construction. But the hospitalero told us all to just ignore it, that the public roads from A Gudina to Campobecerros, which is where the camino goes, are all still open and that there is no authority to force pilgrims off the roads while they are open. Since the detour added 6 kms to a very long day full of road walking, we all just stuck with the camino. North of Puebla de Sanabria, the off-road camino is closed and pilgrims are put on the side of the national highway for 4 or 5 kms.
I expect that the construction situation is a continually moving target. Construction is scheduled to take another four years, and that may be extended as the crisis continues. The little earth mover we saw right out of Lubian (or was it right before?) didn't interfere with the camino now, but when the big construction gets going I imagine a lot of re-routing will be necessary.
From Ourense north the work is done, so the camino has been permanently re-routed to avoid and cross the roads and tracks, and the absence of truck traffic and obvious construction sites mean that things are much more pleasant. There's no doubt that once the construction is done, things improve immeasurably. So a lot of the ugliest stuff is only temporary. And the constant stream of trucks (such as you now have to deal with on the all-road walk into Ourense) will also disappear.
So, I'd say that till the construction is done, there will be inevitable bits and pieces of ugliness, but for me, even the amount I saw now didn't ruin the overall beauty of the walk.
I agree with the comments about how the superhighways are really killing business on the national highways, but I also think that we should keep in mind that most of us would choose to drive from Santiago to Sevilla on superhighways rather than through village after village. I once drove on national highways from Madrid to Santiago (in 1971) and it took 14 hours.
But back to the topic, I have no regrets about walking from Zamora to Santiago this year and found much more beauty than ugliness. Buen camino, Laurie