Tbh, I don’t think the Wicked themeing will make much of a difference for visitors - You still get the yellow brick road, you still get emerald city, you still get munchkin land, you still get the Lion, Tin Man, Scarecrow, Dorothy, Oz, a Good Witch, a wicked witch, flying monkeys and extremely popular songs (pun intended). The loss of ruby shoes and the movies songs is negligible in the big scheme of things. You can call the land Oz and people would still get to experience everything they’d expect to find.