We need to be able to create these shape files in order to import into software such as HEC-RAS, SRH-2D, etc. to create breaklines in these GIS based software models.
Yes, an Alignment linked to the changing featureline would work great for dynamically updating the profile view and surface profiles. Still need to see the profile of the featureline in the same profile view as the surface profiles.
When creating a Profile from a featureline we need to always be able to create the surface profile for EG to go along with the featureline as the design profile.