Nope. Kies will still not work. It's bad software. There's nothing wrong with your phone/device, rooted or not. Kies is unable to communicate through the existing USB drivers because it wasn't written correctly. You can transfer files directly by selecting "Turn on USB storage" on your device. The internal and external memories will show up as two new hard drives in Windows Explorer and you can delete, cut, copy and paste files to your heart's content. That proves that there is nothing wrong with the phone or the connection. You just can't back up or sync using Kies. Wait and a new version of Kies will have to be written since many, many people have the same problem.
As for rooting, I've found this to be highly over-rated. Usually, if there is something that you really hate about your phone/device, there is a way of solving it without rooting - just takes patient research on the internet as you're probably not the only one in the world that hates that particular feature. Otherwise, in most cases, rooting voids your warranty. They keep track of rooting by setting a counter in the phone's/device's processor/chip that records the number of times the chip's system files have been updated. If it does not correspond to the number of valid updates that have been issued since you bought your phone, you have an unauthorized update which they equate to a rooting event which voids the warranty. There are some rooting schemes which claim to bypass this counter, but I have never found one that actually did AND how are you going to tell if it did or not anyway. So unless you're an avid hobbyist, leave the phone/device unrooted. If you're gong to play around, get one phone/device for reliable daily use and another for rooting and pursuing your hobby
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