Posted this down below, but replying to OP to get some sort of discussion on this: I believe the weapons should have been designed as follows: Prior to launch of TDB, all legendary/exotic weapons outside of the raid should have been max damage 300. Any these weapons obtained in the raid should have been max damage 331. This means that the weapons obtained in the first raid, would have been effective in the second raid. When TDB released, max weapon damage should have been 323 for legendaries/exotics not obtained via raid. This means that the system is still rewarding people for completing the first raid and those weapons still have value. Weapons obtained in the raid should then be bumped up to 362 (using +31 damage increase since that's what Bungie did with this increase). These weapons will then be useful going into raid 3. With this system, it'll take two expansions before a raid weapon is considered useless. You are rewarding players from completing the highest difficult mission at the time, you create a reason for players to play older raid content other than shards, and most importantly, players will feel like they are not getting screwed over for their grind the day a new patch is released.