I really try to like the latest version (6, October 2013) of Apple Keynote, but a year later, I still cannot. The user interface in the latest release has been cleaned up (gone is the cramped inspector window), and initially I thought I would overcome the initial confusion where functions are. I did not.
Basic stuff like centring text, changing background colours, fonts, font colours, all require me to think, which submenu to pick: style, text, or arrange? A flowing, fast user interface is not always a logically laid out one. Functions do not always have be grouped together based on whether they are related or not. In software, features should (partially) be grouped based on frequency of use.
Then there is the “Sorry, iCloud Drive isn’t compatible with OS X Mavericks” error message I get everytime I open Keynote. After Googling I now understand that I need to wait for the release of OS X Yosemite and that I upgraded my iCloud too early, still....
Never change a winning team.