ubuntu-desktop should depend on ubuntu-standard should depend on ubuntu-minimal

Background: I like aptitude, especially its ability to flag some packages as "automatically installed" (as the result a dependencies). Those packages are proposed for removal as soon as no "manually installed" package depend on them.

So the first thing I do after installing a fresh Ubuntu is to
* install aptitude
* mark all packages as "automatically installed"
* (this is result in a proposal to remove all packages, which is logical)
* mark back a minimal number of packages as "manually installed" so that all packages are kept

After a fresh install of raring ringtail (beta), here are the package that need to be marked as "manually installled"

* grub-efi
* libreoffice-help-en-us
* linux-generic
* ubuntu-desktop
* ubuntu-minimal
* ubuntu-standard
* ubuntu-restricted-addons
* hyphen-en-us
* mythes-en-us
* openoffice.org-hyphenation
* language-pack-gnome-en
* thunderbird-locale-en-us
* flashplugin-installer

It seems to me that 1/ there are too much of them, and 2/ some of them might even not need to be there (openoffice??).

Namely, why does ubuntu-desktop not depend on ubuntu-minimal and ubuntu-standard?
Why does ubuntu-minimal not depend on linux-generic?
Why does flashplugin-installer not depend on ubuntu-restricted-addons?
Why does grub-efi not depend on other grub-related packages (which are already "pulled" by another package)?

I understand that my use case is probably quite rare.
However, I think it would be a better design in general to have the initial dependency graph cleaner, i.e. with a minimal number of sources.