Apple appears to have literally and figuratively lost Perspective on Keynote.
Keynote was conceived to be high-octane preso software capable of making stunningly beautiful presentations. PPT-users would hang their heads in shame upon seeing a well-crafted Keynote preso.
But Steve Jobs moved on to other projects and Apple corporate shifted its priorities. Keynote's role became that of a team player along with Pages and Numbers intended as Apple's answer to Google Apps (which was Google's answer to MS Office). Multiplatform compatability became valued above all else. PC users *must* be able to create presos using IE to access Keynote on the web.
Keynote:vanilla cannot leverage Mac's hardware/software power. It has to be cross-platform. It cannot be used to create presos that are "too hard" for PCs or iPads (or iPhones, I suppose).
I mean, weren't all you Keynote power-users about to switch to Google Apps' presentation software because you valued cross-platform compatability much more than you value awesome presos? No?
I'd love it if someone more knowledgeable than me were to start a list of all the newly missing features that Keynote 6 boasts. It appears as if Keynote 5.3 will represent the peak of Keynote's preso creation power.
For me? No Mavericks for now and no Keynote 6 until... who knows when?
I was thrilled to be in the audience when Steve Jobs announced every one in the audience at MacWorld 2003 would get a free copy of Keynote 1.0. I still have the boxed disc. I use KN daily as an educator and international speaker.
Keynote 6 is designed for iOS and a very poor app at that. You can't even do something as simple as cutomize the toolbar. Thank goodness the update left Keynote 5 in the iWork folder untouched.
Stay away from KN 6.