One minor quirk I had with creating tables was that it didn't remember the size of table I made last time. Instead, it always assumed that I wanted a 4x4 table when the dialog box came up. It's fairly trivial to just change the values, but it would be nice to just hit Enter instead of typing it in. After speaking to an engineer at Gobe, I think that this feature will probably work its way into a minor update of Productive 2.0. There are lots of little things that you can do in order to make good-looking documents.
Gradient fills for text and backgrounds is a really useful feature.
As a heading, this can create a clear divider between sections of a document, without requiring use of a large font to create obvious whitespace. Your tastes may vary.