I know, nerfing sucks. We spend endless hours mass producing the meta weapons, armor, even build techniques. Memorizing the best routes and spawn timers.
But nerfing is not all bad. As long as there is a counter buff of sorts.
It is yin and yang. Dark v Light. Balance is key though. If done correctly, it creates new game play loops for all modes and styles. Just think how stale the game would get if at some point you just had enough of the meta. No reason to play different. No reason to venture to different areas of the map. no reason to trade in PVE, no reason to test a new melee build in PVE-C. No reason to try new attack and build strategies in PVP.
That is all i have. Nerfing sucks, but it is a necessary evil.