It's a bold game for a mass-market major automaker, though Audi, Hyundai and Volkswagen follow the same trend. Even Bugatti, Rolls-Royce, Bentley, and Aston Martin affix their brand names to their vehicles within company icons or on brake calipers, albeit in small fonts. The coming Continental will wear the word "Bentley" across its trunk, silverware the present Continental does without. Porsche allows customers to delete model designations, but it must be requested. At the other end of the spectrum, the Ford Mustang Bullitt wears zero badges, but the Bullitt is a special edition of a well known model that otherwise advertises its provenance everywhere.
Buick plays in hard-fought segments where mass appeal overrules instantly-identifiable design daring. Those kinds of carmakers usually want to take every opportunity to advertise every sale. Remember the last Buick to go without a make badge? The terrifically handsome Buick Avista concept that wore only two Tri Shield logos and its model name on the decklid. Perhaps that gave Buick some ideas. If the carmaker plans to start putting out cars like the Avista, then this move makes perfect sense.
Update: A commenter pointed out that Hyundai vehicles don't have "Hyundai" badges, only the "Flying H." We've thought of some other brands/models, too. So Buick has mass-market company.