Minimal work has been done on the relational view, and any additional development has been deprioritized behind verbalization and validation of derivation rules and constraints with full join paths, and a complete rework of the relational model to add several much needed features (incremental changes to allow column reordering, just column names, multiple relational mappings from the same model, etc).
Once this work is done we will look at creating a new relational view that allows multiple diagrams and a significantly better UI. As the Relational View description says in the Extension Manager dialog, what we have now is 'slow and temporary'.
You can jump to a specific table on the diagram by finding it in the Model Browser and using the 'Select on Diagram' command. Note that all information you can see in the diagram is also available in the Model Browser.