Mono-White Aggro floods the board with small creatures (Thraben Inspector, Novice Inspector, Fortress Kin-Guard, Battle Screech tokens), making Drown in Sorrow's -2/-2 sweeper excellent at wiping most of their 1- and 2-toughness creatures in one shot. Bojuka Bog has no relevant graveyard target since this deck isn't graveyard-dependent, so it comes out. Our existing removal suite (Cast Down, Unmake, Defile) and sacrifice-based card draw remain strong against their go-wide creature plan, and Crypt Rats is an additional sweeper already in the mainboard worth leaning on.