This is a minor thing regarding the far left, blue pane containing the Inboxes and list of databases:
I would like to see the “Recent Databases” listed below both “Favorites” and “Smart Groups”.
It’s my thought that the those folders I designate as Favorites and the Smart Groups I create ought to be higher in the order of precedence than recently opened databases.
And I see your point, too.
What if those groups had the disclosure triangles so I could reveal the recent databases when I needed them? Or they were more like the Finder sidebar in that I could rearrange them to my liking?