In the early 2010s, they tried an event called the Surf Coast Knockout on the Australian circuit. Here, the field was cut to 65 after 36, then 24 after 54. Top 8 had bye to second round of match play. Six-hole matches on day four (Sunday). Great idea, as it kept the top golfers on the course on day 4 of match play. In fact, the medalist went on to win.
There's so much you can do with an event like this, and I applaud the efforts. I enjoy the 16th at TPC Scottsdale, once a year. I believe that an event like this would pair well with the WGC Match Play. Kids who play nine-hole matches in high school should gravitate toward this concept.