Ben L Wrong
Why not a a tetrathlon consisting in 100m/1500m/5000/half marathon? The decathlon is more "fast twitch" oriented. And why Ashton Eaton is considered more complete athlete than (lets say) Asbel Kiprop, who can run 11.low/3.27/13 flat/1:02...and.he's even doing the steeplechase in practices.
The winner probably would be (in letsrun bizantine discussions) the most complete runner. The perfect mix between speed+endurance.
And get rid of 3000m steeplechase or 50k racewalking.