If McNeil's on the right, he can't cross. If he's on the left, he can't shoot. He's been tried in both positions and neither are ideal because he's so one-footed. But then you have to put him wide because he works hard and has enough stamina to play the position (lately, at least).
Likewise Iwobi. I agree he's much better centrally. But if he's playing central, who's out wide? Gray? Then as well as the defensive system breaking down, you can't press, so we get even less of the ball and have less chance to score. We don't even Gordon as a wide option anymore. I also think it's actually quite a big deal that Townsend has been out for so long. As limited as he is, he has some work ethic and can strike a ball decently with both feet. He'd be useful at the moment.