The Experience Manager contains a nice react based editor for user segments. That editor is good for very basic segment definitions, but far behind the possibility of the Experience Platform.
That’s the reason why we decided to replace the segment editor. The upcoming release of the Experience Manager will contain a new simple script editor.
This seems very technical at first but makes the life much easier and is very powerful. Without any modification all supported segmentation rules can be used and combined.
Soon the documentation section will contain a documentation for the script possibilities.