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Pandora is so good at suggesting new songs, so I would love an option to make a station play only suggested songs that I haven't already thumbed or saved in my collection. The Drop playlist sort of accomplishes this, but only for new releases, and across all genres at once. Back in the day, YouTube music briefly had a slider you could apply to any station where you could switch from "only saved songs" to "mix of saved and new-to-you songs" to "only new-to-you" songs. I guess Pandora "modes" is similar, but after some effort still can't really make sense of what each mode really means.