Hmmm, I think I would be disappointed if Wil was ftm as well. It wouldn't have as much power, especially so soon after Oswald's "reveal." I rather think that it's referring to Wil hiding his true self while he is with the Knights. Also, TheYoungDoyler is a great writer and I think she would be much sneaker than to reveal Wil to be ftm so soon after Oswald's big secret is found out.
I agree with you especially, because Kadeen called Amir's shaving ritual a 'performance' and said, that Amir is just an actor. So..., if Wil really is like that, Kadeen figured it out long time ago. ;3