More Intelligent "previous version"
When editing files with Office Online, a lot of small edits are constantly made, which technically results in a new file on FileCloud. This very quickly replaces all previous versions, which versions that a very minor in their differences.
I suggest a more intelligent way of previous versions, where it will make sure that old versions restorable from e.g. days to weeks ago, so we have avoid having a single session of Online Editing overwrite all old versions of a file.