No one's mentioned the Software Center. I am a little surprised. If they got rid of that awful key client crap (i.e. negotiated better with the vendors), I would put it on my list.
If you are going to list your least favorite (or "most hated" as most people have been putting it) services, can you provide 3 or 4 short statements on why it doesn't live up to its billing? Because, people do read what you say, and pointing out specific flaws (or even general flaws) can end up getting something corrected/enhanced.