I am using the previous version (February 2014), but it still has some flaws that have yet to be fixed. For starters, the subtitles are f#@ked - they will work as usual in UDK, but when playing the packaged version of my game, it refuses to show up at all regardless of what I do. Now here in the May 2014 version I can not find anything of what they exactly did new aside from a few new code scripts (AICommandBase.uc) and perhaps the CoverSystem functionality. Luckily I found such features will definitely help with my game but It would help a hell of a LOT more if Epic Games would release some notes for the public domain as they usually would do. Especially since I still plan to use my game with UDK since user-mod support is already discouraged under the UE4 EULA and replaced with a commercial alternative to persuade common average players to pay a monthly subscription just to make custom content for my game, much less to even make small server-side addons. Mod support is one of the very crucial goals of my game, if that becomes impossible, I might as well can the entire project, and/or refrain from using Unreal Engine and resort to Unity or CryEngine for any future games.