Advances previous and next flow reoprt in Discover

[#1]

I like the previous and next flow Discover reports but they are rather limiting.  As I user I would like:

1. An option to select which next pages I'm interested in, and then Group all others together.
2. The ability to add clicks / exit links in to the report.
3. To select more than 8 next / previous pages.
4. Be able to run a previous and next flow in the same report from my 'starting' page.

There are listed in my order of priority.