I haven't had time to see what's different, but not impressed with Multicam Designer... lagging significantly. Audio sync is out (during playback/edit), and video skips every 4-5 seconds to catch up! Makes it really hard to select cuts between cvamera angles!
I was editing the same 4 camera files in PD14 immediately prior to the upgrade, and it worked perfectly. I have an 8 core (physical) processor, 64GB RAM and a 980Ti GPU, so it's not a hardware issue!
Also, Edit in MultiCam Designer is now buried one more menu deep if you right click an image on the timeline to go back into MultiCam Designer.
No other notable difference noticed yet. My first project produced just fine. Working on the second now. only 3 cameras in MultiCam Designer and still skipping.
https://vimeo.com/timsanson