Yeah, Sasha looks more like her mother than Destry does, and I’d be happy to see either of them as Willie’s daughter, just thought it was Destry’s turn.
I don’t think she necessarily needs to play Indy’s daughter though, but I wouldn’t be opposed to the idea. Just think you could present a funny background cameo. Imagine a poster for a Broadway show with her face on it, and someone comments to Indy, “remember that singer, ran off with some big time director! That’s her daughter!” Would be a wonderful easter egg!