well it looks like blender is exporting to fbx 2014 files so we should be good on that now:).
I have just done some testing and there is some good and bad news.
1: it no longer adds the extra bone (unless you export to fbx version 6.2).
2: it doesn’t rotate the bones axis like it used to (again, unless you export to fbx version 6.2).
3: everything seems to work as expected, but as I don’t have UE4.2 I couldn’t test it with the 2014 importer.
4: blender now has the option to export fbx file 6.2 or 7.4.
1: I got the “invalid bind pose” error when importing.
2: it adds the name of the armature to the bones, so if you have the root bone called lets say “Main” when in UE4 it will be named “Armature|Main”, if you change the name of the armature it will change the name in UE4 as well.
3: blender can only import fbx 2014 (as far as I can tell static meshes only still).
4: there is no “Default Take” option anymore.
I think that’s everything:p, so it looks like it still has a couple of small issues but the files still work;)