Glad to see this post! I'm stickying it.
I'd like to see an easier way to pan...perhaps having a cached "render" of the map that is overlayed whenever you go into pan mode so that when you pan you can see the maps details without having to deal with the ghost pan effect...that may just be me though.
From photoshop, I think a more useful layers dialog/tab would be VERY helpful. In photoshop you can see a little thumbnail of what is on a layer, and very easily turn it on/off and thats integrated into the core of the interface as a primary function. To see that available in CC3 for both layers and sheets would be VERY nice.