That’s what I would have had to recommend you anyway 
. I’m glad you’re moving forward on this.
You’ve hit another point that is scheduled to be implemented as it has been brought up a few times. It would be limited to the shares that were added post-install (through the “Add Storage” feature) as those defined in the rock-on definition should be considered required, but otherwise yes, it’s something that would be quite beneficial.
Here’s a link to the corresponding Github issue:
I myself am planning on attacking these kind of issues in the future, but as I’m currently trying to focus on helping with the openSUSE rebase (see this post from @phillxnet and others in that thread and others), it might probably be in a little while.
Hope this helps,