I think Hakim was lacking on the showmanship aspect of things and I believe that probably cost him a few points. He was quiet, smooth, basic, had very little interaction with the rim, and lacked a little bit in terms of authority. I think DeMar DeRozan had a similar issue on some of his dunks. Super clean
can be a great thing when dunking, but it's not always a great thing.
By comparison, someone like Harold Miner didn't exactly revolutionize the dunk contest - a lot of his dunks were technically completed before - but the manner with which he performed them (power, grittiness, authority, and with attitude) resonated with fans and judges alike.
I've seen a lot of contestants overlook the showmanship aspect of things over the years. It's not just what dunks you perform, but
how one performs them.