Yeah, I remember when they put it in. But thing is that I seem to remember, and I may be misremembering, but I seem to remember back in its heyday you only got like 2 or 3 chances. Or maybe not even that in Jordan's day. I woould imagine they loosened the rule to allow for people to attempt more difficult dunks, but in the process it has made the whole thing a borefest wiht 3 missed dunks per every made dunk and sometimes minutes of nothing.
I think in its heyday it was 3 dunks per round and they dropped the low score. It may have gone to best of 2 in the final round.
If I were a judge and a dunker kept repeating the same dunk over and over until it was made I'd take a point off for each miss.
Maybe to fix it they could bring it back to basics. Have 5 or 6 classic dunks and have each contestant do their spin on it. The thing that was so impressive about Jordan's free throw dunk wasn't that he jumped from the free throw line, it was his grace in the air. Several people have repeated that dunk throughout the years and it came off looking like just another dunk because they had no style and grace but for some reason the conventional wisdom was "Oh, free throw line dunk, automatic 10". Rubbish.
Here's one idea for a pool of 8 contestants.
First round the contestants do 3 predetermined (before the contest) classic dunks in their own style. One redo will be allowed during this round but all 3 dunks count. Highest 4 combined scores advance.
Second round 4 contestants spin a wheel to decide their two dunks. Drop the low scores, highest 2 scores advance to the final.
Final round is the top 2 contestants, dunkers can do any dunk they want, 2 dunk attempts, highest score wins.