Well, like Lynn, I like to use PRV to modify or create my own EZDrummer drum patterns. It's how I'm used to working in Cakewalk from when I first bought it years ago. I like the convenience of PRV to modify velocities, too.
I have another couple of issues with EZD in CbB, the GUI no longer shows the hits on the various parts of a kit, it's like looking at a static picture instead of seeing the dynamic hits I'm used to seeing in Sonar 8.5. Also, I can't seem to get the drum kit to change if I want it to, let's say from Blues Kit to Vintage Kit. It's really easy in Sonar, just click on the drop-down menu in the top RH corner of the EZD GUI and click on a different kit and it loads. But not so in CbB, even though the drop down menu shows the name of the new drum kit, the GUI and the kit don't update, and neither do the sounds.