If an average of 49 and a strike rate of 100 is terribly out of form, I wouldn't want to be bowling at him when he is in form. 
On a serious point though, I'm not surprised that Davies has been given a go with the gloves, but I would have retained Kieswetter in the squad with Pietersen out. Give him a go either opening or at 3 without having to worry about the gloves to see how he goes. The ODI squad seems to be relying on Wright at 6 and Bresnan at 7, which could be an issue on pitches with a bit of juice in them.

On a serious point though, I'm not surprised that Davies has been given a go with the gloves, but I would have retained Kieswetter in the squad with Pietersen out. Give him a go either opening or at 3 without having to worry about the gloves to see how he goes. The ODI squad seems to be relying on Wright at 6 and Bresnan at 7, which could be an issue on pitches with a bit of juice in them.