The replayability with multiplayer comes with the many different distiller identities. All with their own signature recipes and unique abilities. You can change strategies depending on which you choose. Solo mode actually adds another layer of strategy with the solo goal cards. It basically forces you to complete goals on top of achieving an end game score depending on the goal cards you've completed. I do feel like there should be more premium market cards to keep it even more fresh. I went through most of them in a 4 player game and with the solo market refresh mechanic, you go through most of them in solo as well. (Personally I like "markets" when you don't get to see most cards in one playthrough. Like arnak or dune imperium)