Statistically McBeth's struggles this weekend were limited to putting, which has been the case all year. He was the second best this weekend outside the circles, and in the circles he was worse than the average golfer.
https://udisclive.com/live/jonesboro2021/?t=playerStats&stats=all&d=MPO. From a quick survey of the other tourneys, that's not been exactly the case, but he's generally been good at throwing and bad at putting this year.
Also, the video was clear that McBeth wasn't going to actually putt using the Magnet, but that they were allowing him to warm up better. They mentioned something about it being straighter. I'm not going to guess as to what that means, but its very odd.
If McBeth can figure out his putt, he'll still be the favorite to win worlds. He's still the top rated player even with it being a little shaky. But Ricky and Calvin are currently the favs in my mind.