I think there is a higher weighting of ICC rankings given to series results rather than individual Tests. The weighting is a combination of the strength of the opposition in world ratings X different values if the series is home or away. It means the likes of Australia would not pick up many...
I see your thinking, we have better seamers than them but they have one spinner who could unlock the door...I remember Sunil Gavaskar scoring 221 batting in the 4th innings there years back...
That's a tad unusual, The Oval traditionally used to be a dry dusty old Rice pudding skin of a wicket for years and we traditionally used to end up with a draw at the end of a series here.