The American craft beer umbrella contains the best and worst beers I've ever had. Extremeness probably has a lot to do with that. My biggest bone to pick is with shifting definitions. Today's Pale Ale is what an IPA used to be. And today's IPAs make the old Sister Star of the Sun recipe took tame. Many stouts are stouter than their old imperial brethren. And you certainly can't trust fruit to be subtle anymore. I love trying new beers but the noise to signal ratio in American craft brewing is huge and only getting larger. For every great craft beer I find, there are 5 or 6 others that are decent at best, and 3 or 4 that make me wish I had just bought a 6er of Coors instead.
I'm all for being as simple or extreme as you'd like. This is America, right? But what I don't like is pushing the boundaries and not being clear about that on the packaging. Dogfish does a great job of letting me know right from the start that they're a little extreme. Dale's Pale Ale? That should be labeled an IPA before someone puts their eye out.