I think I was mostly in shock with the change to Sivir. I am slowly getting better with her new style, and it's starting to scare the mids I face against. Q and W make for good harrassment at max range, and I have had to adjust my Masteries and starting items to get more accustomed to the new play style.
I still don't like her passive at all, but I really didn't care for her passive previously either, so no harm done. I haven't had a successful kiting session yet though to make me impressed by it. Boomerang Blade doesn't proc the effect, so you are stuck with Auto Attacks, which sadly still have too low a range to make it work. Chasing is obviously a lot easier though. I have started running with Swiftness boots to give me additional speed.
--
http://img218.imageshack.us/img218/3156/couchpotatocat.gif