In reply to Jonny:
I don't have much useful to add apart from to keep an eye on Chamoniarde (chamoniarde.com/en/mountain-topics/mountain-conditions#) and on the Alpine Conditions page here on UKC. And talk to the OHM in Chamonix when you arrive.
It's difficult to say whether the routes you mention would be in condition. I expect that the Kuffner, Frendo and Tour Ronde north face would probably be OK, but of course it depends how good you are at climbing routes in sub-par conditions. Arete du Diable might be OK if the rock itself is dry. Later in the season the access can be difficult as the approach couloir is just a load of steep choss, so going early may work in your favour. I have no idea about the Innominata, but it's considerably more committing than some of the other things on your list. I wouldn't want to get shut down by conditions half way up.
I was under the impression that the routes on the Brenva Face (in particular Route Major and The Pear) were complete chop routes. I've certainly not heard of anyone climbing them in recent years. But I know a few people who've been on the Brenva Spur and said it wasn't that bad. Hard to advise without knowing your threshold of acceptable risk.
Personally I think it's always worth having a poke around and seeing what there is to do. Good luck!
Post edited at 15:20