Yea I'm kinda surprised that FG or the like haven't done more sabermetrics around off-field metrics. Like FV against actual career WAR for various teams. Or whether year-to-year WAR exceeds projections for MLB calibre players. It seems like player development is where the real surplus value is these days. On field metrics have gotten so good that FA signing values are rarely much of a surprise.
As far as the Jays yea maybe it's just luck lately after a period of bad luck. Personally I don't think it is entirely luck. Coaching/development is huge in any sport, especially one like baseball that's more on the skill side as opposed to raw athleticism.