I feel like removing the trash mobs kind of defeats the point of having a dungeon with more explorable and challenging elements? Not to compare apples to oranges but it reminds me of how between Heavensward and Stormblood they removed trash pulls from raids. Now I'm not saying trash mobs should be in raids, but it did give me more of a feeling that I was "raiding" an area. It just feels like more of a trial otherwise.