Perspective Grid Enhancements in Illustrator CC
The Perspective Grid, which has been around for a while, has been improved dramatically in the latest release of Illustrator CC. So much so, it gets my vote for most improved feature in Illustrator. Why do I like it so much? The objects that are drawn on a perspective grid and the grid itself are now connected. So if you need to change the perspective of your completed drawing, you just change the grid and the whole drawing updates to your new perspective.