Projects on Roadmap view to display based on Go-Live / or custom date

The Program Roadmap view displays the due date of projects. 

It would be very useful to be able to show a project on the roadmap based on a Go-Live or custom date.

My sponsors and stakeholders are much more focused on the Go-Live of projects rather than the associated post GA activities

The roadmap view is great visual as one can show multiple projects on a single time line. The "problem" is projects which have say 2 months of post GA activities show the due date of the project as being 2 months later.