I believe that most of us would like to see all related servers in our chosen bundle of mods. I do not know how much it is possible and then identify which servers are to be displayed, but maybe one of you knows if it is possible and it will be possible to realize this dream. It would be nice if even such less known packages were on the list. And the list itself would probably require creating a special website or downloading data from existing lists.
The only way to even start to do that is have a dedicated server and website that acts as a server categorization site with every server owner having to submit their own server (Not that much of an issue, but is hard without anyone usign the mod) and apply mod tags by either being generated from the manifest for the modpack or user submitted/defined tags. The mod also would also have to take your modlist and compare it with that ENTIRE server list causing slower load times and if it is done at the server select screen, it would take a long time to pop up every option/server. It is a tangible, but optimization would be too much of an issue for it to be useful, but cool idea nonetheless.