Well i think the idea is that unless really specified that they were once male they are still a futa just without a vagina. Tbh i kinda dont know the futa with or without a vagina argument is as old as time. In all honesty we should probably abandon the turn shemale for dickgirl since that seems more accurate in most circumstances.
What evidence is there that the character doesn't have a vagina? In fact the cover is the only image where you get a peek at anything from behind, and it looks like she does have a vagina to me. That's too low down to be her anus, and it would be the wrong shape too. (Plus I just can't recall seeing Freckles do shemales)
And that's without getting into the fact that futanari doesn't actually refer specifically to hermaphrodites, but I will accept that the tag definition for this site does incorrectly state that they must have a vagina. In cases like this where you can't tell or it's unclear it seems perfectly reasonable to assume they do have one though.