On principle, I agree with you -- this project should be split into multiple packages. However, it's the distro's job to harmoniously put various open source packages together. It's impossible for package authors to make everyone happy. Plus, in the moreutils case, the author has already gone to great lengths to publish his work for free, he shouldn't have to put up with more work to the point where it stops being fun for him/her. Finally, it's just NOT appropriate to call parts of this project "trash". He scrached his itch and was kind enough to publish his work. If you don't like it, just don't use it, no need to be harsh about it.
The right way for distros to package this is to split the moreutils source distribution into moreutils-* packages, plus a meta package that pulls in all of the commands. So your complaint actually belongs in your distro's bug tracker -- it has nothing to do with the moreutils project.
Calling software "trash" is uncalled for, but squatting on a namespace is a real thing and not something that you can justify behind the usual "someone did this for free and owes you nothing" because this make the landscape worse for everyone else.
The right way for distros to package this is to split the moreutils source distribution into moreutils-* packages, plus a meta package that pulls in all of the commands. So your complaint actually belongs in your distro's bug tracker -- it has nothing to do with the moreutils project.