You will also get concerns from the SCL team and others about the size of any packages which people suggest be added. If every single package that someone wanted were added, the size of the image would grow dramatically. We would end up with same as the overly bloated official Docker images using Debian on Docker Hub for various language stacks.
If weren't for the pushback on that, I am sure I would have a string of packages would like to see added. One right now for example which encountered in last day is ImageMagick being missing. It stops me from using official Python S2I builder for a specific application in Python space.