Location+ is not a good evaluator metric for bullpens. Relief pitchers are paid to get quick outs and shut down innings not to finesse themselves out of jams. Velo and movement are an imperative for an effective bullpen; neither of which are accounted for in Location+. So we have to take a grain of salt with Laikas post about having the second worst bullpen Location+ in baseball.
I think the Jays are on the right track. Get the best collection of Stuff for the bullpen as you can muster and roll the dice. There is no perfect formula.