Yeah I'm really not a fan of how they are handling nerfs to existing items. People have been collecting that stuff for weeks already, you can't just change their existing items from under them like that, particularly when people are paying gold and real money for stuff. The best way to do that is to make them obsolete by making future drops more attractive. Maybe they have less attack speed but have a new, interesting modifier or ability. The IAS nerf slows down the gameplay quite a bit too and I felt like it was already much slower than D2. I think thats why I finally settled on a DH on my main despite liking other classes abilities more, it was very fast paced and enjoyable before the nerfs.
Hang in there though, at least you get a lot more drops in general now. Something is bound to drop that will be useful, that's what I tell myself anyway