“Yes, Kobo now accepts FXL EPUBs exported from InDesign and they can be put on sale, they have confirmed the same. The FXL EPUB output from ID also renders correctly on a Kobo device.”
Now that is certainly good news which is to be added with the existing iBooks acceptance of ePUB3 books. But the real change has happened more subtly.
All distributors now accept ebooks with embedded fonts
I still have not had any success with direct uploads to NookPress or Kobo Writing Life (though they do take FXL books fine). However, Draft2Digital can handle the files fine and get them uploaded, accepted, and approved by their five distributors: Nook, iBooks, Kobo, Scribd, and a German distributor.
Kindle, on the other hand has many issues. I still must IDML back to InDesign CS6. Tables remain a mess and all graphics need to be converted to inline objects. Anchoring still does not work with them through KDP.