Description of problem:

Current vim installations uses solid /etc/vimrc for initialization.
It makes more difficult to maintain per-host (or per - organization)
configuration initialization changes.

Proposition: 
Add to the end of /etc/vimrc such lines:

" system local configs
for rcfile in split( globpath("/etc/vimrc.d", "*.vim"), '\n' )
  execute( 'source '.rcfile )
endfor
  
" user local configs
for rcfile in split( globpath("~/.vim/vimrc.d", "*.vim"), '\n' )
  execute( 'source '.rcfile )
endfor

And add descrption of /etc/vimrc.d/ to spec file:

mkdir -p %{buildroot}/%{_sysconfdir}/vimrc.d
...
%dir %{_sysconfdir}/vimrc.d

Benefits: both system administrators and users can easy adjust
vim behaviour.

Cost: minimal - number of loaded plugin files is mush more then number of configs