I really love the "Copy Link" button. It's such a simple thing but I love not having to highlight the newly created link to copy it. Just a quick click to copy and another quick click to check the link before sending.

The "Upload New Version" feature however, does not function how one would expect. I assumed that this was like "Save as..." for linking but it's more like "Save" Here's what I mean:
I've uploaded a second rendition of a mock-up. I realize after I've sent the link that I forgot to include something. In the past (2 versions ago?) I could copy the new file, past it into my local directory where files are sync'd and it would update the file to which the link was connected. I expected the "Upload New Version" feature to behave the same way but instead, it only updates the actual Assets file while the link remains the same as the first rendition of version 2. So technically....it's not a new version. This means I have to RE-share the file and ask my client to use this new link instead. It was so much more convenient when the link did not need to be changed when the file was updated.