I haven't done the Raid yet, but regardless, I've said it 1000 times all over these forums. The cheapest, laziest, most boring way to make a boss hard in a game, any game, is add ons. Think about the other bosses in the game if they didn't have waves/adds. Embarrassingly easy and pretty lazy designs. And from what I'm gathering there was a sweet spot people found that was somewhat "safe" in a section of the raid but now some adds spawn there?! Never heard of a game that patches *punishes* players for finding mechanics that work for them to beat something/enjoy themselves.