@MowMdown I have been thinking about reworking the entire snapshot admin dialog, but it is still in the draft phase. However, what you suggest maybe even more problematic than the current approach. Many people using ZFS have tens, if not hundreds, of snapshots in a single dataset, and displaying that inline along with the dataset will be a nightmare for you as a user and for me as the developer.
Right now, I'm more inclined to directly present snapshots grouped by date (no more than ten buckets) on the contextual menu and implement another contextual menu for the dataset with all the related actions. But if you folks have any other ideas, I'm more than open to reading them.