I think the Entity Diagram has been forgotten. 

I think you need do a revamp.

Starting to can make an Diagram public, so you can share between eSpaces;

When you export as image, the Diagram.png the quality of the image is very low;

Add more information at the Entity, like Type of data and cardinality.

More topics can be improved, when the OS team look over that topic.

Best Regards,
Pedro Vila Nova