I think we can still be offensive in that formation - three players without much in the way of defensive duties and with the ability all three have to create something out of nothing should give us the offensive power we'll need. That said, I think the manager agrees with you and I'm enjoying watching it.
I don't unfortunately think that McCormack can play the number nine role at the head of our front line - I think Kodjia can but Bruce likes him to the left and I think Gestede can, but he's not mobile enough for the way we want to play. I think that's why we're linked to strikers. For McCormack, I think he's perfect for the number 10 role behind the striker, but then so is Grealish and so is Ayew. For me, McCormack is the spare wheel at the moment, but an excellent option from the bench and a hell of a show of strength in depth at this level.