The hut food wasn't too bad actually or even nice - most cook the same dish every single day (as I learned hiking the GR20 in 2 successive years) - but breakfast is mostly crap and gets in the way of an early start - thunderstorms from noon likely in June. You can resupply in the gardenshed shop at Vizzavona station (meth and gas too) and the little shop at Col de Vergio. The GR also passes a few bergeries with nice produce on sale (but nothing else) and some huts have little kiosks. The most common problem on the GR20 are foot injuries - for many sections, there is no "trail" at all (but plenty of flashes) and excess weight seems the main cause for injuries and dropping out...
I'd try keeping total weight to under 10kg for that GR and food as an easy weight saver (all hut supplies arrive by mule so food isn't cheep...)
Also, do you really need a 900gr quilt? None of the huts are at higher altitudes and your biwi adds 5c to any quilt for the extra cold night (I did both my hikes with a Cumulus 350 SB and was always snug in single wall shelters). The mat seems a little heavy too?
Great to hear about Vizzavona, I've heard mixed reports on fuel availability there. I am definitely planning breakfast 'on the go' as I don't like to hang around in the morning.
I knew I'd get pulled up on my sleep system weight! I sleep quite cold, and also more around a lot in my sleep. My system is rather luxurious but for a guaranteed good sleep I'm happy to take this weight. My other gear is pretty light so it evens up things a bit. I'd like to get a lighter Katabatic Gear bag next as I love my big one, but I seem to always be out in the worse weather so that took priority when I go this one last year.
I've taken the food off and kept 500g for breakfast and snacks. I'll take food or buy food at the refuges.
Weight now is 10.8kg, which will be 1-2kg lighter as each day progresses as I'll be drinking.
Anything else anyone can pick up on that I've missed or am being too generous about?