I think when Phillips is out, we simply cannot try three at the back. It relies on wing backs and we don't have anyone other than Matty who can do that job on the right. And if we are going to persist with it, we might as well put Edwards in ahead of Mears - he can't exactly be worse, can he?
A bigger problem is Livermore and Barry not showing for the CBs at all, not one bit. People are criticising the distribution of the CBs but it's Livermore and Barry's responsibility to make their jobs easier. Give them options, don't just stand there with two players between you and the ball.