I'm not sure why they didn't realize that BRD having crit-based procs on its songs was just going to make it pull further and further ahead of MCH the longer the expansion went on due to it inherently scaling better with gear.

At this point, I've lost faith in the class ever having a chance at being good until 5.x, since it's just fundamentally flawed because of how clunky its mechanics are to utilize in movement heavy fights.