With Moeen and Root in the side, I don't think we need 5 specialist bowlers. Our batting has been incredibly frail, so I'd go with the stronger bat, and Moeen has been excellent since he came in, so I'd keep him at 6. A top 7 of Cook, Robson, Ballance, Bell, Root, Moeen and Prior looks pretty strong, and I'd say a bowling attack of Broad, Plunkett, Anderson and Kerrigan looks good too, especially when we have 2 more than handy spinners to back them up.
Kerrigan's the best spinner in the country, and should be picked. He might have struggled against Australia in 6 overs, but deserves another go. He's definitely a better option than Ali, Borthwick and Panesar.