Based partially on suggestions by Chris Dyer, I implemented a number of user interface changes. For example, the menu has changed to a drop-down menu where menu items are only shown if the feature is enabled for the conference. For example, conferences that do not use visa letters will not show menu items related to such letters.
The conference and track configuration displays contain a lot of information. We are trying two different new renderings to make these easier to read and find. For conferences, we are using a tabbed format, for tracks and reviews a list with call-out headings on the left. If you have preferences for one or another, or a different format, please let us know.