When opening a schema with a lot of tables, they are all laid out in the bare. This is painful for navigation especially with a lot of databases. If there were an option for nesting things using some basic criteria such as delimitation (default _, user selectable). It would make a substantial improvement.
Other options might be to group by letter and nest automatically based on child count but I'm pretty sure starting out token based is more than enough.
The system might want a few optional rules to cater for special cases, such as if the token is the only one in the current expansion, then it shouldn't be collapsed but merged instead with its children, etc.