Why add another layer? Right now the only tool he needs is an editor. That's it. Can't get any simpler than that. He also probably has a set of templates by now.
At the end of the day the drudgery they are doing is writing the post, something they'd have to do anyway on a static site generator. Writing the raw html likely takes no friction at all, since they are probably copying and pasting some template or at this point know all the tags they use by heart so its no harder than a more abstract method.
