I'm not sure they actually had such a squadron; the three Bretagne class, roughly comparable to the British Orions, and the four Courbet class, in the same approximate league as Neptune and her half sisters, are pretty much it for French dreadnoughts, for that war at least; none of the Bretagnes have been in service for very long, they may not be fully worked up, and their armour was iffy even by pre- Jutland standards.
What they do to fleet command and control is the interesting part- as much mud as can be slung at the RN over this, Jellicoe describes the progress in signalling from a flag hoist taking fifteen minutes to be repeated and acknowledged down the length of the battle line, through extensive harbour training, down to less than two. (It was originating signals, like, oh, sighting reports, that the fleet was genuinely, criminally, atrociously bad at.)
How well, or otherwise, does the Marine Nationale handle these things? Are they better at reporting to the Flag- you'd like to think that couldn't be worse, but...
How good is their night fighting? The drawings and photographs don't show much in the way of searchlight capability, I can't find anything about them even having starshell that early- if they prolong the battle line enough that the Germans collide with something solid during the night action, that might make a difference, especially if they were any good at it. Which, playing catch- up and looking for any available advantage, they might have been. Any confirmation on WWI French night abilities and doctrine out there?