I think you are mistaken In The Know.
Ed Milibrand appears to be more an old fashion Labourite than Blair ever was.
Whether that is good or bad only time will tell. I notice however that commentators and even you (and he) are talking about his voice and looks etc which do come across as strange. That could work to his advantage as these days image is everything and even a strange image, as Mr King would know being an expert promoter, is as saleable as any other.
One only has to look at the current PM and deputy PM who are like peas in a pod and extensions of the Blair model. Likely to become unfashionable very soon.