Broadway Flash said: "I think Florence Pugh would make an excellent Sally"
And here is part of the problem with the stunt casting they want to do (and need to do) in order to cover their astronomical running costs: Florence Pugh is the type of star who would be a great get for them. She is an Oscar nominated actor with major appearances in two majorly popular franchises. They would surely be happy to have someone like her. BUT would an Oscar nominated actor with major appearances in two majorly popular franchises want to be a replacement (or second, third, fourth etc. replacement) in a Broadway show, where they won't get a cast recording and won't get any shot at a Tony? Unless they really want to shift focus and become an ongoing Broadway presence, or this particular show is a bucket list item for them....people of Pugh's Hollywood status will likely pass on this. And then you get the type of TV actors that London has recruited, who may be exceptionally talented, but do not have the name brand to sell tickets at the levels needed.
I'm fine with it puttering out after Redmayne leaves. Wider audiences are just now discovering his Pennywise interpretation of the role, but beyond his misguided Emcee, the entire production is just horrifically directed. Bebe and Steven are really the saving graces here and the only elements that kept me engaged and imbued their material with compelling characterizations and gravitas. It's not just the biggest misfire of the season, but the biggest misfire of the past several seasons, by a large margin.