Im from the STL area, have a couple friends that work there. They've pretty much confirmed exactly that. In fact, there was a short spike in sales revenue because half the ones switched to more expensive InBev brands.
Probably not unexpectedly, BL saw virtually no downturn in sales in STL
Talking to said friends that work at InBev, it's less beer in general. Gotta remember that the core customer base of beer companies are people knocking back 12+ most nights of the week. Those people are (literally) dying out and (thankfully) are not really bring replaced.
Also have to remember that a fairly large portion of "local" craft breweries, at least in terms of sales volume, are owned by corporations like InBev