The Panopticon/Should we delete the pure historical category?

From Tardis Wiki, the free Doctor Who reference

Now that the pseudo-historicals category has been deleted, I think we should have a debate the pure historicals. The other category was deleted for being poorly defined so how do we feel about the definition of a "purely historical" story (i.e. no science fiction elements apart from the Doctor and the TARDIS)? Is that good enough or is more needed to justify the category?