It really wouldn't be. While I certainly think changes like these are generally sound and that taking them as personal insults is incredibly unproductive, I can emphasize where these folks are coming from.
Even if the nerfs don't get them a clear right away, even if they spend another 2 weeks wiping on it they'll know that whenever do they finish that the fight they finished was not the fight they started on. Before the nerfs the question was "Can we beat this?" after the nerfs the question is "Could we have beaten that" and they'll never get a chance to really know. That's true regardless of how things turn out with the new version for them.
That's a loss and one that's normal to be disappointed about, even if the reasoning & timing behind the nerfs are sound.
