Epic needs to continue working on 3d asset integration, as it stands its not too hard to get from 3ds/maya to the UDK but it's horridly archaic for dealing with upgrading the assets or just doing any sort of tweaking.
They need to take a page out of the Unity engines' FBX integration. Using proprietary ACE files is causing my soul to fade into the abyss.
Other than that all those changes look good.