Sorry, for replying to my own message. But I thought I would add some information that I have been collecting on this.
Here is a discussion on the owncloud feature request that was closed, without implementation.
Based on the lack of response, I’m guessing this suggestion will not get much traction. If it would make a difference, I am willing to contribute real money to this request and open up a bountysource.
I have been surveying other cloud file syncing apps, although I have not verified with testing. Based on some of that reading, pure OS symbolic links look like they have presented a challenge for other file sync applications.
Google Drive - Yes
Dropbox - No
MS OneDrive - No