I read the bullet sponge bit, but my reference is more to the fact that EVERY boss battle involves the same thing: Boss spams infinite, high-DPS ranged attacks making it impossible to leave cover for too long; boss has massive damage AoE melee that makes using shotties/CQB tactics practically suicide; mob spawns for day; and on top of all that is the sponginess. If Bungie got rid of even one of these things, we would see a massive upshot in variety of playstyles. As of late, there is only one good way to play without some cheesy method, and even then: snipe from good cover to avoid boss's ranged attacks and use rockets for great DPS, maintain distance to not get OHKed by the boss's melee. Clearly, since sniping and rocketing at a near-stationary target are the best choices, is it any wonder that the two snipers and one launcher best at this are the most highly prized? I propose some examples: -The boss doesn't have a ranged attack and moves quickly to deal insane melee damage. The response? Players would have to constantly move, mind their surroundings, and use weopons geared towards killing mobile enemies (eg. Truth, Fusion Rifles, MGs, etc.). -The boss has no melee and is slow moving. The response? Players with agility builds could easily close the distance, outmaneuver the boss, and deal massive damage on a hypothetical back-mounted crit spot using a shottie. Suddenly a shotgun becomes an excellent high-risk/reward tool. These were off the top of my head. Any competent game designer who concepts these for a living should be able to do far better than these.