According to the forum post:
* A number of exploits have been corrected. As usual we can’t get specific on these.
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A number of tooltips have been added to the Broker including “Already collected” for collectible items.
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Many Feats have been fixed!
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Matchmaking has been improved! Instances with no one in them will now be closed. Also instances do not automatically open when a player leaves. Players can vote to re-open it if necessary.
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A large number of UI changes including an overhaul of the Social UI.
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Numerous Nature and Mental powers have been fixed.
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Dozens of Mission bugs have been squashed!
The patch will be released and a more detailed patch notes list will be included.