I visited my local Longchamp boutique (U.S.) yesterday and was disappointed to see that not much fall merchandise had arrived, maybe only about half. I was told that the company has recently changed its manufacturing system, which was taking longer than anticipated and has resulted in delays. Boutique staff said they usually have all the new stuff by June and they wished they had more to display. (Also at the U.S. department stores--Neiman Marcus,
Nordstrom, Bloomingdales--I've noticed they have much less fall Longchamp merchandise than they typically would at this point in July.)
My boutique did have the fall colors for the Pliage nylon and Cuir lines. That Red Lacquer Cuir is a stunner IRL. I played with the small size of the bag, which is what I'd buy, and the slouchiness didn't bother me so much because it is compact. I may end up getting some Cuirs this season.
There were no Mlle Longchamp, Madeleine, Effrontee, Penelope Arty,
Shop It, Cuir Etoiles bags in stock yet... There were only a few new colors, but not the full range, to see for the Roseau, Paris Rocks, Foulonne, 3D, Penelope, Paris Premier lines.
In the Foulonne line, I was able to check out the new smaller saddle bag (below) and was surprised to see that its relatively flat and is divided into two compartments inside, which for me really cuts down on the usefulness. It couldn't really pass my usual test of holding my mini umbrella and sunglasses without bulging out.
This Foulonne, while also flat, was actually slightly more spacious than the above.
This larger Foulonne saddle bag was not in stock yet to see unfortunately.
Ok, I'm biased - I'm a Cuir fan haha 
