The “Beef” Season 2 cast features heavy hitters like Carey Mulligan, Oscar Isaac, Charles Melton, Youn Yuh-jung, Song Kang-ho and Cailee Spaeny, the latter of whom’s performance feels less like a revelation and more like a confirmation of her seemingly limitless screen potential. And yet, nearly all of the season’s human stars are overshadowed at points by Burberry, the sweater-clad Dachshund dog that Mulligan and Isaac’s oft-feuding spouses both equally dot on and adore.