Her W changes have been known about for a while, and were included in the patch notes. I don't really know why they removed the circle indicator that shows where it'll hit, but I just practiced it in a bot game before playing a real game to get used to it.
They changed the way it casts because people just picking up taliyah for the first time found it unintuitive, since it was the only skill in the game that cast how it did. It's almost guaranteed that she's going to get damage nerfs in the future though, since right now getting hit by her W means you're going to get burst down by undodgeable E-Q right after, which I can't imagine is very fun to play against.