+1 for Lim-Dul
I like updates. Always have, always will. I remember back in the day, when every major CS beta update spawned a wave of complaints. Of course 1.5->1.6 was the worst, but 6.0->7.0 and 7.0->1.0 were pretty bad too.
It's so strange, that there are so many young and mentally agile people, that like playing games that require you to change and adapt your tactics, don't like change.
But Lim, in this case it is a bit different. The sandmann really should not be in the game. Valve themself's said in the beginning, that they didn't want anything that impairs another players vision or movement, becaue it pisses people off. And they were right, because being stunned like this should not be in a FPS game.
You can compare it to the flashbang from CS because it has a similar purpose. If you do that, you'll see that the sandmann is just too "out of control" to be fun or fair.
And I also think that your assesment of the importance of the competitive community is wrong. A good competitive community is what decides if the game will live or die. It's one of the most important factors too, because the competitive scene is the major selling argument for a game after it's initial release (think internet communities, lan-parties, ...)
Prime example for this is NS, which was always balanced for competive gaming first and public second. But because of it's strong base, it survived a lot longer and stronger than any other 3rd party mod.