One of the most simple, and usable, things is dragging a file to an email to send to a client. Doesn't work with version 10.1.7
I have to save the file to my computer and then drag it to the email, then delete the file from my computer or I'm going to fill that up!! Seriously. This can't be all that difficult. It's one of the best features for me as a send lots of email communications.
Printing a note - now 2 or 3 steps from what I can tell. I sometimes just want to print a note in PDF to Evernote, gathering various pictures, scans, or screen shots in one document. They made it more difficult.
I hope someone is on this fast. Very frustrating.