First off, Yoan Moncada is a gold glove caliber 3B. He's 7th in all of baseball in 3B fangraphs defensive rating, and 7th in UZR/150. He was 4th in both last year. So yes, I am going to going ahead and proclaim Yoan Moncada a defensive guru. He already played multiple spots, playing a MUCH better 2B than Burger did (remember they wouldn't even let him play it daily at AAA?), also coming through baseball while playing a respectable SS, but was moved off because of the players in front of him in Boston In Xander Boegarts, and then Tim Anderson is Chicago.
Yeah, if you want a flex on Yoan, you might have an argument on the power stuff, but defensively? No. No way.