It may just be my crappy memory but it seems like this isn't a new development for NB.
I recall wanting to find a recipe I had cribbed from NB many years ago to give it another go. What I found in my own notes were rather less than I was looking for so I hit their site to get the grain/hop bill again. And I found nothing but kits with no ingredient lists. That was at least a year, if not two, ago.
I can understand a company wanting to protect their intellectual property, so while I was disappointed I did not see a big, scary conspiracy. Just a company policy change.
AB-InBev didn't buy NB directly (as far as I know) but via an incubator type venture capital group. NB brewer likely has a licensing agreement with Goose Island, AB or both that limits what they can release about the ingredient list. In this day and age, where a company can patent "a rectangle with rounded corners" it is the way business is done. Like the many trademark conversations we've had, if you don't protect your IP you don't own your IP.
Homebrewers as a collective don't like the macro breweries but not everything they do is automatically an evil development to crush the craft market. We need to keep a bit of perspective on these developments. Decisions get made and we aren't privy to the details but that's okay, NB isn't my company.
If you buy the kit with unmilled grain, maybe you can start reverse engineering the recipe. Then you can post your clone of the clone recipe.
RDWHAHB and brew happy.