Any cutbacks visible in the F-Class lounge at ZRH? - No
Do they still let in onward F passengers in who are in transit to C-class flights? – Yes. Show them your F-Class Boarding Pass with your C-Class boarding pass for your European leg.
Any glaring changes to the in-flight catering and amenity packs? - Yes. Fewer dvd-movies; hand, eye and face lotion only if available.
Are they still doing cabin maintenance, or am I likely to find that the seats don't work? – Yes, they do cabin maintenance.
Finally, are the cabin crews showing the effects of it all in their attitude? – As always, there are excellent cabin crews and good cabin crews.