To add to the list, the concept of Masters has been significantly diminished.
You can no longer:
- have builds in Master slides. Masters are supposed to be work saving templates that allow you to create a consistent look and feel for any given slide. Builds/animations are no longer supported on masters, so any builds (i.e. bullet by bullet builds, etc) cannot come from masters. To me this represents a fundamental shift from carefully crafted and honed masters to 'willy nilly' and needless duplication of work at the individual slide level. A big step backwards.
- drap and drop masters onto slides to force a master to slide inheritence. While you can still link masters to slides, the full-screen master OR slide modal view obscures the relationship between master and slide, making it harder to work with these overall.
To me it seems that a design decision at the software level was made to significantly diminish the importance of masters. That's a real shame - some of us have labored intensely to create masters that contain a series of builds and animated sequences, and that work now is completely lost.
Other shortcomings are being highlighted by others, but this alone compels me to stay with 5.3.
I love what Apple is trying to do by making more iOS capable presentations, but we're losing an awful lot in the process.