The recent change on the patch 5.4 PTR changing the Glyph of the Weaponmaster was, in real terms, completely insignificant. A cosmetic glyph in the first place, the idea that it worked with legendaries was nice, but hardly significant. I mean, I play the game now and I can't use my legendaries, so what changes? Realistically, nothing changes. And yet, I wasn't merely disappointed by the change. I was outright enraged by it, far more so than I have been by direct nerfs to my class of choice.
Part of it is due to attachment -- we invest time and effort into these avatars of ourselves, after all. But in the end, much of my anger was rooted in the fact that this was something small (in relative terms, since all of WoW can be considered small compared to many of the shocks and calamities of our actual lives) and harmless, that gave our characters nothing in terms of power or ability, that imbalanced absolutely nothing in terms of gameplay, and yet it was still taken from us. Sometimes, the smallest cuts hurt more entirely because they are small.