Could you try this plugin? http://ww.wp.xz.cn/plugins/reenable-shortlink-item-in-admin-toolbar/
This was a feature before WordPress 3.3, but was removed then (I’m afraid I’m not up to date on the rationale, perhaps when Twitter started using t.co and so shortlinks weren’t “required” anymore).
Cheers!
If Twitter’s t.co feature was the rationale, then it’s a very small-thinking rationale because there are other reasons to use short links.
I’ll check out the plugin.
The idea of what ships with core WordPress and what is “plugin territory” is what the majority needs. The rationale that the majority used shortlinks due to Twitter, based on their character limit (and why it was added in the first place) and, with that rationale removed, it didn’t make sense to include for everyone.
The functionality used to create/handle shortlinks remained (so plugins like Jetpack or Bit.ly’s plugin, etc) could easily tap into WordPress to create, display a shortlink was left in place, as well as the “hook” needed for the plugin mentioned above to add it back to the display area.
It’s a fine line to walk when developing software that is used in so many places to keep it as feature enabled as possible, without bogging it down and making it too difficult for “regular” or new users.
Cheers!