There's updated information on the landslide on the post I referenced above (#13):
Here's what the poster wrote:
"Hello Andycohn,
Please note that this event has nothing to do with the construction site between Borce and Urdos, the latter is paused this winter and while a Bearded Vulture nests, possible resumption around early May.
So for now, it’s the N134 road (with traffic) from Accous to Urdos, or the bus.
I will try to give you information as soon as I have it on both events.
Be careful if you are staying at the Borce hostel and taking the bus, remember to get off at the Etsaut stop to take the path that will lead you to Borce.
To finish the Arles route in the Vallée Aspe (Escot - Col du Somport), there remains a mountain path with all the difficulties that come with it (passage on the narrow N134 road, narrow path with passages where you need to be careful, ...)."
Given the situation, it probably makes most sense to walk from Sarrance (where most people will be staying at the monastery) to Accous, and then take the bus to Urdos, where there's a good gite communale (municipal albergue) and an inexpensive hotel. This is probably preferable to getting off the bus at Etsaut and crossing over the river and the main highway -- with its own heavy construction -- to get to Borce. Staying at Urdos will also save you a few kilometers on the steep climb the next day to the pass. Note that the (one and only) albergue at the pass didn't open until May 18 last year, and none of the hotels in nearby Candanchu were open, so once you get to the pass you face seven steep and rugged downhill kilometers into Canfranc Estacion.