I love the new interface! I'm a ProAnimator user and my employer is going to get FX for me..nice! I'm hoping that any future ProAnimator releases will use the FX interface. I like the setup buttons on the bottom and to easily switch between different interfaces with a click of the mouse. This looks like a great product. Can't wait for it to come in.
Thanks for the compliments. We're finding the new interface flexible and very useful (considering the large number of panels available).
One note about Workspaces: You can switch between each Workspace button by typing Cmd+# (where # is 1 for the first button, 2 for the second button, etc.). I've found flipping between Workspaces with a key command very helpful.
And, of course, you can set up your own Workspaces and save them to the buttons (Shift+Click on a button to save your current layout to a button).