He's arguably more of a goalscorer than King if the stats are indication; according to their Wiki pages, Harewood has scored exactly the same amount of goals as Marlon King, but played 49 matches fewer.
All this means is that instead of people calling it the FA Cup and not mentioning E.On at all, they'll be calling it the FA Cup and not mentioning Budweiser at all.
Unless Phillips has known injury issues, I don't see any reason for him to have a problem with the physical side of the Championship. Look at Graham Alexander at Burnley, around the same age he was behind their promotion and then their PL campaign.