Aside from the blindingly obvious. Having watched the cockpit video the pilot seems to be continuously arm wrestling the controls in all directions, are all those vigorous and frequent control inputs really necessary to land a 737? Even if flying through a bit of a rain squall. Can't help but think he's working too hard on that, needlessly, and losing oversight of what's really important. I've seen a few helicopter pilots fly like that. Get them to take their hands off the controls and it will fly much better.