What is still broken (for me at least) is when sharing pictures from the photo app via Outlook, most of the time, the email received by the recipient has no attachment despite it being correctly attached when the email was composed. This has been ongoing for a long time. At work, I now use a Lumia 925 with 8.1 specifically for this purpose, I cannot rely on my 950 at all for this, even the anniversary update had similar issues, so much so, that I jumped back into the fast ring (couldn't be any worse, and it isn't), but this particular issue is still present.
Also, approaching the problem from another angle i.e. composing an email and then trying to insert a picture doesn't work either, 9 out of 10 times, when I choose "Insert", the Picture option is greyed out, however the File option isn't, but attaching it as a file results in the same issue as before, the email with attachment sends normally but most of the time the attached image is not present when the recipient receives it.
The L925 I now use at work for these tasks has been flawless in this respect.