Originally Posted by psylockolussus
For me, she has to be a mutant just because this movie is still set around the X-Men universe. So they are either a mutant or a human. Plus it makes things less complicated and easier to understand. Though I don't think she was a mutant in the comics.
Sure, it could be potentially complicated, but considering Deadpool in Origins it's not completely unprecedented. Though that would still be considered a mutation of sorts, albeit an artificial one.