Quit changing weapons, plain and simple. The Vex Mythoclast, for example. Yes, it was strong. But you had to beat Vault of Glass on hard to get it. IT SHOULD BE OP! You had to go through hell to get it, it should at least be worth the effort! Eventually, weapon "balancing" will make every gun equal. So why don't you just remove all but one individual gun from the game. If everyone has the same gun, it can't be OP right? Yet you will still have people complain about things being overpowered. So how about listening to your community for once and not ruining your game? It was fine the way it was. At the very least, make PvE and PvP changes separate so the weapons will still be at least somewhat useful.