Schiesser ledges access

We did the up Perren / down Schiesser ledges loop as part of guides exam. Of note, going down from the Neil Colgan hut to access the glacier leading to the start of Schieser ledges has gotten worse.
The transition from the trail down to lower angle glacier ice involves going down an unstable 60-70m scree slope sitting on a melting ice core. The rubble is steep, shallow, with several even steeper rolls at crtitical angle of repose, leading to bare ice bellow. We felt this was the crux of the day in terms of hasard.
Bare straightforward glacier across the plateau then leads to the start of Schiesser ledges.
The ledges were snow free and had seen recent traffic, routefinding seemed less problematic than previously remembered.