A lot of my work involves using InDesign to typeset academic books (80,000 to 200,000 words). These are invariably created in MS Word (by international academic authors) then professionally copy-edited in MS-Word. Capturing character attributes (italic, superscript, bold etc.) from this source copy is ESSENTIAL (the idea of pasting plain text is ridiculous). In my usual workflow I already open DOCX files in Word and re-save as RTF; the DOCX format is unreliable when placing into InDesign. This is a long-winded way of saying that, for me, having only RTF as the source format for placing text is not a deal-breaker.
The lack of footnote/endnote support unfortunately is a deal-breaker for me and the AP beta is unusable for my post important projects.