Why wouldn't Draymond be able to guard Malone?
Draymond would be able to guard Shaq and Hakeem at least as well as Rodman guarded them. Remember, Rodman guarded younger skinny Shaq, not prime Shaq, and only for spot duty. And when Rodman was on the spurs Hakeem tore them apart for nearly 40-15-5 that series, so clearly neither D-Rob nor Rodman were stopping him.
I remember the Blazers putting Brian Grant on peak Shaq, so the Warriors would definitely put Draymond on Shaq at times. It wouldn't go well, but Shaq would struggle getting pulled out to the 3pt line on the other end too. I remember sometimes he got beat by old-ass Sabonis from the perimeter.
This is Shaq's PLAYOFF defense on the perimeter in a tight WCF:
Pulling Shaq out to the perimeter regularly would definitely have disrupted their defense.