Just take a look at the C17 floor to see what wrong with the floor of the C130J? The former is an ergonomic delight, easy to use, for example quick to transform from flat floor to rollers etc (they just flip around). The C130J you have to lift the slats out to perform the same job. Much more cumbersome and slow. The Movers I've talked to hate it!
Well said DBL. The J floor may be a slight advance on the K, but it is light years behind the C-17's. Having worked on Danish J's in theatre with the same floor design and locks as the C-17, it begs the question; Why not our aircraft? ££££ Would be my guess...