I've got a few suggestions for Evolution, now that Bonobo is being removed and a lot of code refactored.

In my opinion Evolution needs a tabbed interface. Users already know tabs and most likely use them a lot – at least everyone I introduced to Firefox' tabs in the past really liked that functionality. For a nice Desktop-experience Evolution's interface should look similar to the ones that are already implemented in Nautilus or Epiphany, users should not have to search for functionality that is normally provided in a toolbar or the menu.



Short summary:
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Move bottom left icons (completely wrong place compared to other Gnome applications) to the toolbar or remove them completely and put their functionality into the menu.

Show open tabs (=modules) below the toolbar.

If an event like clicking an e-mail address or the panel-calendar triggers opening a module, don't open a new window with that module selected, but open a tab if it doesn't already exist and select it.

Remember opened tabs and restore them at start, so that fetching e-mails and reading calendar information for example can be done in the background.


Optional:
Allow placing at least two tabs side by side and remove the to-do-list from the calender (it never belonged there anyway in my opinion).



Please let me know what you think about my ideas.


Greetings from Austria,
Alex