Now that questions selected for Hot Network Questions have a record attached to them, those can be queried for in the Data Explorer.
However, the Data Explorer is only updated once a week. It would be nice to also have a full list of questions that are selected for Hot Network Questions and the times they dropped on and off the list added to the 10k tools. In my opinion, it adds to the "bird's eye view" of the site that is afforded to them, and is in line with other similar lists (e.g. migrated questions, protected questions, etc.).
Also, a list of questions that were removed from Hot Network Questions by a moderator would be very nice as well.