When you type a length or rotation in Sketch Polyline or Sketch Polygon, the preview now moves to the point Enter will place. The Length and Rotation popup also comes back on every polyline, not just the first one.
In Sketch Polyline and Sketch Polygon, typing a length or rotation swings the preview line to where Enter will put the next vertex. This works for every side, not only the first. If you type only one value, the other still follows the cursor. Clicking to place, following the cursor and finishing with an empty Enter all work as before.