100 paces is now equal to one base width, so it is physically possible to turn an element 90 degrees( before there had to be a special rule that said you could) and when an element is In the second rank, ie front to back with the front line of the group, they can move left and right along the group's rear in som kind of regular increment. Also, it prevents people from completely rearranging their line before the enemy reaches them. You can still try, but it's not encouraged. And it grows shooting/charge ranges, which looked ridiculously small compared to the miniatures moving them. Warband move decently fast in solid form just bc of the wider increments. You may argue that your opponent moves the same, of course, but it takes more PIPs for them to rear move.