In previous programs I've used (such as Sked Social), I found it helpful that the client would be able to amend the caption, for example, but that wouldn't "save" without being approved by me. It would show a red line, or green for new text added etc.

I'm finding its a bit clunky for the client to have to re-write captions in the comments, then I have to copy/paste/change it myself etc. It would save time for both people if the client had a bit more freedom with their access (but also incorporating the feature of how much access that client can have... as I know some would break things! haha)