One option to try is to use the browser filters if you mostly care about a few types of tables.
For example, most of the time, I only care about custom packages and tables. All of our custom stuff starts with 'Z', so I created a filter called custom and added "object name like 'Z%'. I have that as my default filter. I created another filter for HR/Benefit objects (object name like '%BEN% or object name like '%HR%' etc.) since that's the application I work on. Then I just choose the filter that I need. The response time for me went from about a minute getting all packages to a few seconds using filters.
Another option to look into is to work with your DBA's and try to make the SQL getting the data run faster. I haven't tried this though since the filters work fine for me.
Mike