[the phantom]

But of course there is this....

If I had been assigned the role of Walter, I would have, without a doubt, seen the benefits in impersonating the Divo. I mean, usually a suspected gifted would get killed in the Night, and thus when you keep living and keep living a gifted impersonator would be swiftly suspected.

But not if you're impersonating the Divo, for they cannot be killed at night, and so it would be no wonder that you continue living. It is protection from the village and the Critics to be the suspected Divo. And thus I would have, right from the start, set out some clues that, upon looking back, would "prove" my claim as the Divo.

So, if our resident Walter sings the same way I do, he will be as likely as the Divo to be believed. In that case an early reveal (as in now) would indeed be nice.