I was thinking not having anymore trips west of the Mississippi might help because that is seemingly always death, but I forgot they still have to go the hellscape that is Petco for 4 games.
There is no greater indication of how bad the rest of a game is going to go than NSB game threads talking about how hard the opposing pitcher is getting hit or how hittable they look.
I was just doing this math too, it officially brought it down to less than half of the Game 7 25 man roster is now still with the Cubs (13 to 12). The 9 you listed and then Russell (AAA), Zobrist (Div.), Strop (IL).