As mentioned above and elsewhere, please leave the feedback ... your feedback "might" change this unacceptable situation. Your silence will do nothing ... so, go here and express your disappointment: http://www.apple.com/feedback/itunesapp.html
Spread the word, on social media, in the news, etc.
Here is the copy of my feedback to Apple:
Missing info tab in OSX iTunes after OSX 10.9 upgrade
This is an unacceptable change, and makes my ipad, and ipod, and my wife's iphone useless as a serious tool we used to depend on. Welcome back Windows?
The ill conceived requirement of being on Internet, and making Internet connectivity a must to sync calendar, contact and other data is outrageous, severely limiting, and discriminatory. The approach threatens my data security and infringes on my privacy and right to protect my data my way in my own environment.
The fact that even signing off from icloud wipes the calendar clean, and threatens my other personal data existence on my computer in my home which for the decades was a source and master set of my personal data is unthikeable. I know how to protect it and how to manage it and I do not need the big brothers help in doing it.
Give me back my data, and the ability to manage it and sync between my devices on my own terms at home, in the woods, in the middle of an ocean, without the expense of broadband connectivity and intrusive infrastructure.
In summary ... hands OFF my data.