I am pretty on the record about my support of Dayton Moore. I think he is a genuinely good dude, took the Royals to two (not at all fluky) World Series appearances and had jewelry before Andy Reid or Patrick Mahomes.
But yeah, as far as general managing and building teams and the stuff generally associated with being a general manager goes, the game had left him behind. Probably more around 2013.
After being fired by the Royals, he wound up in Texas with former Royal and now Rangers GM Chris Young, who is building his team very differently than Moore ever did in Kansas City.