Civil Labeler Slopes Complex Lines

It would be amazing if the "Element Annotation" or "Civil Labeler" could provide individual slopes for complex lines in plan view in a seamless automated way. Is this feature available I just haven't found it? 

The text favorite I've been wanting to use is "Plan Annotation.Profile Ahead Grade" which works great for individual line segments.

I have found you can use the "Linear3d Annotation.Point Slope" with Civil Labeler, but it only works with Data Point - and it's pretty clunky. Has anyone found a better way?